diff --git a/Sources/Plasma/PubUtilLib/plPhysX/plSimulationMgr.cpp b/Sources/Plasma/PubUtilLib/plPhysX/plSimulationMgr.cpp
index bc0e7b0b..97454212 100644
--- a/Sources/Plasma/PubUtilLib/plPhysX/plSimulationMgr.cpp
+++ b/Sources/Plasma/PubUtilLib/plPhysX/plSimulationMgr.cpp
@@ -595,10 +595,12 @@ void plSimulationMgr::AddCollisionMsg(plKey hitee, plKey hitter, bool enter)
         plCollideMsg* pMsg = *it;
 
         // Should only ever be one receiver.
-        // If there's more than one, you suck.
+        // Oh, it seems we should update the hit status. The latest might be different than the older...
+        // Even in the same frame >.<
         if (pMsg->fOtherKey == hitter && pMsg->GetReceiver(0) == hitee)
         {
-            DetectorLogRed("DUPE: %s hit %s",
+            pMsg->fEntering = enter;
+            DetectorLogRed("DUPLICATE COLLISION: %s hit %s",
                 (hitter ? hitter->GetName().c_str() : "(nil)"),
                 (hitee ? hitee->GetName().c_str() : "(nil)"));
             return;
diff --git a/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.cpp b/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.cpp
index 761db0e3..57a3648d 100644
--- a/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.cpp
+++ b/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.cpp
@@ -242,67 +242,28 @@ plCameraRegionDetector::~plCameraRegionDetector()
 
 void plCameraRegionDetector::ITrigger(plKey hitter, bool entering, bool immediate)
 {
-
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-    if (entering && fNumEvals - fLastExitEval <= 1 && fSavingSendMsg)
-    {
-        DetectorLog("%s: Skipping Camera Entering volume", GetKeyName().c_str());
-        fLastEnterEval = fNumEvals;
-        if (fSavingSendMsg)
-        {
-            DetectorLog("%s: Dumping saved Camera Exiting volume", GetKeyName().c_str());
-        }
-        fSavingSendMsg = false;
-        return;
-    }
-    if (!entering && fNumEvals - fLastEnterEval <= 1 && fSavingSendMsg)
-    {
-        DetectorLog("%s: Skipping Exiting volume", GetKeyName().c_str());
-        fLastExitEval = fNumEvals;
-        if (fSavingSendMsg)
-        {
-            DetectorLog("%s: Dumping saved Camera Entering volume", GetKeyName().c_str());
-        }
-        fSavingSendMsg = false;
-        return;
-    }
-
-    // get rid of any saved messages... this should happen though
     if (fSavingSendMsg)
-    {
-        DetectorLog("%s: Killing saved camera message... shouldn't happen", GetKeyName().c_str());
-    }
-    // end PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
+        DetectorLogRed("%s: Stale messages on ITrigger. This should never happen!", GetKeyName().c_str());
+    if (fIsInside && entering)
+        DetectorLogRed("%s: Duplicate enter! Did we miss an exit?", GetKeyName().c_str());
+    else if (!fIsInside && !entering)
+        DetectorLogRed("%s: Duplicate exit! Did we miss an enter?", GetKeyName().c_str());
 
     fSavingSendMsg = true;
     fSavedMsgEnterFlag = entering;
     if (entering)
     {
-        //DetectorLog("%s: Saving camera Entering volume - Evals=%d", GetKeyName().c_str(),fNumEvals);
+        DetectorLog("%s: Saving camera Entering volume - Evals=%d", GetKeyName().c_str(),fNumEvals);
         fLastEnterEval = fNumEvals;
     }
     else
     {
-        //DetectorLog("%s: Saving camera Exiting volume - Evals=%d", GetKeyName().c_str(),fNumEvals);
+        DetectorLog("%s: Saving camera Exiting volume - Evals=%d", GetKeyName().c_str(),fNumEvals);
         fLastExitEval = fNumEvals;
     }
 
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-    // we're saving the message to be dispatched later...
     if (immediate)
-    {
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-
         ISendSavedTriggerMsgs();
-
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    }
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-
-
 }
 
 void plCameraRegionDetector::ISendSavedTriggerMsgs()
@@ -311,23 +272,20 @@ void plCameraRegionDetector::ISendSavedTriggerMsgs()
     {
         for (size_t i = 0; i < fMessages.size(); ++i)
         {   
-            char str[256];
-
             hsRefCnt_SafeRef(fMessages[i]);
             if (fSavedMsgEnterFlag)
             {
                 fMessages[i]->SetCmd(plCameraMsg::kEntering);
-                sprintf(str, "Entering cameraRegion: %s - Evals=%d -msg %d of %d\n", GetKeyName().c_str(),fNumEvals,i+1,fMessages.size());
+                DetectorLog("Entering cameraRegion: %s - Evals=%d -msg %d of %d\n", GetKeyName().c_str(),fNumEvals,i+1,fMessages.size());
                 fIsInside = true;
             }
             else
             {
                 fMessages[i]->ClearCmd(plCameraMsg::kEntering);
-                sprintf(str, "Exiting cameraRegion: %s - Evals=%d -msg %d of %d\n", GetKeyName().c_str(),fNumEvals,i+1,fMessages.size());
+                DetectorLog("Exiting cameraRegion: %s - Evals=%d -msg %d of %d\n", GetKeyName().c_str(),fNumEvals,i+1,fMessages.size());
                 fIsInside = false;
             }
             plgDispatch::MsgSend(fMessages[i]);
-            DetectorLog("%s", str);
         }
     }
     fSavingSendMsg = false;
@@ -337,30 +295,15 @@ void plCameraRegionDetector::ISendSavedTriggerMsgs()
 hsBool plCameraRegionDetector::MsgReceive(plMessage* msg)
 {
     plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);
-
     if (pCollMsg)
     {
         // camera collisions are only for the local player
         if (plNetClientApp::GetInstance()->GetLocalPlayerKey() != pCollMsg->fOtherKey)
             return true;
-        
-
-#ifdef USE_PHYSX_MULTIPLE_CAMREGION_ENTER
-        // first determine if this is a multiple camera region enter (PHYSX BUG WORKAROUND)
-        if (!fWaitingForEval)
-        {//plObjectInVolumeCollisionDetector::MsgReceive() will flip fWaitingForEval
-        // and registers for the Eval, child objects of plObjectInVolumeCollisionDetector
-        //must decide when they are no longer interested in Evals. I suggest using IHandleEvals()
-        
-            fNumEvals = 0;
-            fLastEnterEval=-999;
-            fLastExitEval=-999;
-        }
-    
-        // end of (PHYSX BUG WORKAROUND)
-#endif  // USE_PHYSX_MULTIPLE_CAMREG_ENTER
-
+        // Fall through to plObjectInVolumeDetector, which will register us for plEvalMsg
+        // and handle it for us. (Hint: See ISendSavedTriggerMsgs)
     }
+
     return plObjectInVolumeDetector::MsgReceive(msg);
 }
 void plCameraRegionDetector::Read(hsStream* stream, hsResMgr* mgr)
@@ -383,23 +326,6 @@ void plCameraRegionDetector::Write(hsStream* stream, hsResMgr* mgr)
         mgr->WriteCreatable( stream, *it );
 
 }
-void plCameraRegionDetector::IHandleEval(plEvalMsg *pEval)
-{
-    fNumEvals++;
-    if (fNumEvals - fLastEnterEval > 1 && fNumEvals-fLastExitEval>1)
-    {
-        ISendSavedTriggerMsgs();
-        plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
-        fWaitingForEval = false;
-    }
-    else
-    {
-        if(fSavedActivatorMsg)
-            DetectorLog("%s didn't send its message. fNumEvals=%d fLastEnterEval=%d, fLastExit=%d",
-                GetKeyName().c_str(),fNumEvals, fLastEnterEval, fLastExitEval);
-
-    }
-}
 
 /////////////////////////////////
 /////////////////////////////////
@@ -409,127 +335,8 @@ void plCameraRegionDetector::IHandleEval(plEvalMsg *pEval)
 
 void plObjectInVolumeDetector::ITrigger(plKey hitter, bool entering, bool immediate)
 {
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-/*  if (entering && fNumEvals - fLastExitEval <= 1 && fSavedActivatorMsg)
-    {
-        //DetectorLog("%s: Skipping Entering volume", GetKeyName());
-        fLastEnterEval = fNumEvals;
-        if (fSavedActivatorMsg)
-        {
-            //DetectorLog("%s: Dumping saved Exiting volume", GetKeyName());
-            delete fSavedActivatorMsg;
-        }
-        fSavedActivatorMsg = nil;
-        return;
-    }
-    if (!entering && fNumEvals - fLastEnterEval <= 1 && fSavedActivatorMsg)
-    {
-        //DetectorLog("%s: Skipping Exiting volume", GetKeyName());
-        fLastExitEval = fNumEvals;
-        if (fSavedActivatorMsg)
-        {
-            //DetectorLog("%s: Dumping saved Entering volume", GetKeyName());
-            delete fSavedActivatorMsg;
-        }
-        fSavedActivatorMsg = nil;
-        return;
-    }
-
-    // get rid of any saved messages... this should happen though
-    if (fSavedActivatorMsg)
-    {
-        delete fSavedActivatorMsg;
-        DetectorLog("%s: Killing saved message... shouldn't happen", GetKeyName());
-    }
-    // end PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-*/
-    if(!immediate)
-    {
-        
-        bookKeepingList::iterator curit=fCollisionList.begin();
-        while(curit!=fCollisionList.end())
-        {
-            if(hitter==(*curit)->hitter)
-            {//hey the object is already in my list
-                //try and figure out what my real state is
-                if(entering)
-                {
-                    (*curit)->enters++;
-                    if(!(*curit)->fSubStepCurState)
-                    {//We weren't already in
-                        (*curit)->fSubStepCurState =true;
-                    }
-                }
-                else
-                {
-                    (*curit)->exits++;
-                    if((*curit)->fSubStepCurState)
-                    {//We were already in
-                        (*curit)->fSubStepCurState =false;
-                    }
-                }
-                //get out
-                break;
-            }
-            curit++;
-        }
-        if(curit==fCollisionList.end())
-        {
-            //hitter was not in the list add him in
-            //hitter was not in the current frame list
-            //lets find out its state in the begining of the frame
-            ResidentSet::iterator curres = fCurrentResidents.find(hitter);
-            bool initialState;
-            if(curres != fCurrentResidents.end())
-                initialState =true;
-            else
-                initialState =false;
-
-            plCollisionBookKeepingInfo* BookKeeper=new plCollisionBookKeepingInfo(hitter);
-            if(entering)
-            {
-                BookKeeper->enters++;
-                BookKeeper->fSubStepCurState =true;
-            }
-            else
-            {
-                BookKeeper->exits++;
-                BookKeeper->fSubStepCurState =false;
-            }
-            fCollisionList.push_front(BookKeeper);
-        }
-
-
-    }
-    else
-    {
-        plActivatorMsg* ActivatorMsg = new plActivatorMsg;
-        ActivatorMsg->AddReceivers(fReceivers);
-        if (fProxyKey)
-            ActivatorMsg->fHiteeObj = fProxyKey;
-        else
-            ActivatorMsg->fHiteeObj = GetTarget()->GetKey();
-    
-        ActivatorMsg->fHitterObj = hitter;
-        ActivatorMsg->SetSender(GetKey());
-        if (entering)
-        {
-            ActivatorMsg->SetTriggerType(plActivatorMsg::kVolumeEnter);
-        }
-        else
-        {
-            ActivatorMsg->SetTriggerType(plActivatorMsg::kVolumeExit);
-        }
-        
-        plgDispatch::MsgSend(ActivatorMsg);     
-        
-
-    }
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-
-/*  fSavedActivatorMsg = new plActivatorMsg;
-
+    hsRefCnt_SafeUnRef(fSavedActivatorMsg);
+    fSavedActivatorMsg = new plActivatorMsg;
     fSavedActivatorMsg->AddReceivers(fReceivers);
 
     if (fProxyKey)
@@ -542,47 +349,36 @@ void plObjectInVolumeDetector::ITrigger(plKey hitter, bool entering, bool immedi
 
     if (entering)
     {
-        //DetectorLog("%s: Saving Entering volume - Evals=%d", GetKeyName(),fNumEvals);
+        DetectorLog("%s: Saving Entering volume - Evals=%d", GetKeyName().c_str(), fNumEvals);
         fSavedActivatorMsg->SetTriggerType(plActivatorMsg::kVolumeEnter);
         fLastEnterEval = fNumEvals;
     }
     else
     {
-        //DetectorLog("%s: Saving Exiting volume - Evals=%d", GetKeyName(),fNumEvals);
+        DetectorLog("%s: Saving Exiting volume - Evals=%d", GetKeyName().c_str(), fNumEvals);
         fSavedActivatorMsg->SetTriggerType(plActivatorMsg::kVolumeExit);
         fLastExitEval = fNumEvals;
     }
-*/
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-    // we're saving the message to be dispatched later...
-    if (immediate)
-    {
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
 
-        
-    //  fSavedActivatorMsg = nil;
-
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    }
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
+    if (immediate)
+        ISendSavedTriggerMsgs();
 }
-/*
+
 void plObjectInVolumeDetector::ISendSavedTriggerMsgs()
 {
     if (fSavedActivatorMsg)
     {
         if (fSavedActivatorMsg->fTriggerType == plActivatorMsg::kVolumeEnter)
-            DetectorLog("%s: Sending Entering volume - Evals=%d", GetKeyName(),fNumEvals);
+            DetectorLog("%s: Sending Entering volume - Evals=%d", GetKeyName().c_str(), fNumEvals);
         else
-            DetectorLog("%s: Sending Exiting volume - Evals=%d", GetKeyName(),fNumEvals);
+            DetectorLog("%s: Sending Exiting volume - Evals=%d", GetKeyName().c_str(), fNumEvals);
 
         // we're saving the message to be dispatched later...
         plgDispatch::MsgSend(fSavedActivatorMsg);
     }
     fSavedActivatorMsg = nil;
 }
-*/
+
 hsBool plObjectInVolumeDetector::MsgReceive(plMessage* msg)
 {
     plCollideMsg* pCollMsg = plCollideMsg::ConvertNoRef(msg);
@@ -591,36 +387,18 @@ hsBool plObjectInVolumeDetector::MsgReceive(plMessage* msg)
         // If the avatar is disabled (flying around), don't trigger
         if (IIsDisabledAvatar(pCollMsg->fOtherKey))
             return false;
-       
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-        // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-        if (!fWaitingForEval)
-        {
-            plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
-            fWaitingForEval = true;
-        }
-        // end PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
         ITrigger(pCollMsg->fOtherKey, (pCollMsg->fEntering != 0));
-
+        plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
         return true;
     }
 
-#ifdef USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
-    // PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-    plEvalMsg* pEval = plEvalMsg::ConvertNoRef(msg);
-    if (pEval)
+    plEvalMsg* pEvalMsg = plEvalMsg::ConvertNoRef(msg);
+    if (pEvalMsg)
     {
-        
-        //if (fSavedActivatorMsg)
-        //  DetectorLog("%s: InVolumeEval=%d with saved message", GetKeyName(), fNumEvals);
-        //else
-        //  DetectorLog("%s: InVolumeEval=%d without saved message", GetKeyName(), fNumEvals);
-        IHandleEval(pEval); 
-
+        fNumEvals++;
+        ISendSavedTriggerMsgs();
+        plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
     }
-    // end PHYSX_FIXME hack for PhysX turd that sends bunches of enter/exits over one frame
-#endif   // USE_PHYSX_COLLISION_FLUTTER_WORKAROUND
 
     plPlayerPageMsg* pageMsg = plPlayerPageMsg::ConvertNoRef(msg);
     if (pageMsg && pageMsg->fUnload)
@@ -631,75 +409,6 @@ hsBool plObjectInVolumeDetector::MsgReceive(plMessage* msg)
     return plCollisionDetector::MsgReceive(msg);
 }
 
-void plObjectInVolumeDetector::IHandleEval(plEvalMsg* pEval)
-{
-        plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
-        fWaitingForEval = false;
-        for(bookKeepingList::reverse_iterator it= fCollisionList.rbegin();it!=fCollisionList.rend(); it++)
-        {
-            bool alreadyInside;
-            ResidentSet::iterator HitIt;
-            HitIt = fCurrentResidents.find((*it)->hitter);
-            if(HitIt != fCurrentResidents.end()) alreadyInside = true;
-            else alreadyInside=false;
-            plActivatorMsg* actout=new plActivatorMsg;
-            actout->fHitterObj=((*it)->hitter);
-            actout->SetSender(GetKey());
-            if (fProxyKey)
-                actout->fHiteeObj = fProxyKey;
-            else
-                actout->fHiteeObj = GetTarget()->GetKey();
-            if((*it)->fSubStepCurState)//current substate says we are entered
-            {//different enters and exits
-                //figure out what to do
-                    if(!alreadyInside)
-                    {//we are actuall entering
-                        actout->SetTriggerType(plActivatorMsg::kVolumeEnter);
-                        fCurrentResidents.insert((*it)->hitter);
-                        actout->AddReceivers(fReceivers);
-                        actout->Send();
-                        DetectorLog("%s sent an Enter ActivatorMsg. To: %s", GetKeyName().c_str(), GetTarget()->GetKeyName().c_str()  );
-                    }
-                    else
-                    {
-                        DetectorLog("%s squelched an Enter ActivatorMsg.", GetKeyName().c_str());
-                        delete actout;
-                    }
-            }
-            else
-            {
-                //fSubStepCurState says we are outside
-                    if(alreadyInside)
-                    {//we are actuall exiting
-                        actout->SetTriggerType(plActivatorMsg::kVolumeExit);
-                        fCurrentResidents.erase((*it)->hitter);
-                        actout->AddReceivers(fReceivers);
-                        actout->Send();
-                        DetectorLog("%s sent an Exit ActivatorMsg. To: %s", GetKeyName().c_str(), GetTarget()->GetKeyName().c_str());
-                    }
-                    else
-                    {
-                        DetectorLog("%s squelched an Exit ActivatorMsg.", GetKeyName().c_str());
-                        delete actout;
-                    }
-            }
-        }
-        DetectorLog("*********");
-        for(bookKeepingList::iterator it = fCollisionList.begin(); it != fCollisionList.end(); it ++)
-        {
-            delete (*it);
-        }
-        DetectorLog("This is the regions inhabitants after the op");
-        for(ResidentSet::iterator it = fCurrentResidents.begin(); it!= fCurrentResidents.end(); it++)
-        {
-            DetectorLog("%s", (*it)->GetName().c_str());
-        }
-        DetectorLog("*********");
-
-        fCollisionList.clear();
-
-}
-
 void plObjectInVolumeDetector::SetTarget(plSceneObject* so)
 {
     plCollisionDetector::SetTarget(so);
@@ -725,6 +434,7 @@ void plObjectInVolumeDetector::Write(hsStream* stream, hsResMgr* mgr)
 
 
 plObjectInVolumeAndFacingDetector::plObjectInVolumeAndFacingDetector() :
+    plObjectInVolumeDetector(),
     fFacingTolerance(0),
     fNeedWalkingForward(false),
     fAvatarInVolume(false),
diff --git a/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.h b/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.h
index 5600a442..f2fa65ea 100644
--- a/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.h
+++ b/Sources/Plasma/PubUtilLib/plPhysical/plCollisionDetector.h
@@ -73,7 +73,8 @@ public:
         kTypeBump       = 0x20,
     };
 
-    plCollisionDetector() : fType(0), fTriggered(false), fBumped(false){;}
+    plCollisionDetector() : fType(0), fTriggered(false), fBumped(false){ }
+    plCollisionDetector(int8_t type) : fType(type), fTriggered(false), fBumped(false) { }
     virtual ~plCollisionDetector(){;}
     
     virtual hsBool MsgReceive(plMessage* msg);
@@ -90,48 +91,26 @@ public:
 // sub type for object-in-volume detectors
 class plObjectInVolumeDetector : public plCollisionDetector
 {
-public:
-    class plCollisionBookKeepingInfo
-    {
-        friend class plObjectInVolumeDetector;
-        public:
-            plCollisionBookKeepingInfo(plKey& hit)
-            {
-                hitter=hit;
-                enters=0;
-                exits=0;
-            }
-            ~plCollisionBookKeepingInfo()
-            {
-                hitter=nil;
-            }
-        protected:
-            plKey hitter;
-            int enters,exits;
-            bool fSubStepCurState;
-    };
 protected:
     virtual void ITrigger(plKey hitter, bool entering, bool immediate=false);
-    //virtual void ISendSavedTriggerMsgs();
-    virtual void IHandleEval(plEvalMsg* pEval);
-    bool    fWaitingForEval;
+    virtual void ISendSavedTriggerMsgs();
     
     plActivatorMsg* fSavedActivatorMsg;
-    
-    typedef std::list<plCollisionBookKeepingInfo*> bookKeepingList;
-    bookKeepingList fCollisionList;
-    typedef std::set<plKey> ResidentSet;
-    ResidentSet fCurrentResidents;
+    uint32_t fNumEvals;
+    uint32_t fLastEnterEval;
+    uint32_t fLastExitEval;
 
 public:
     
-    plObjectInVolumeDetector()
-    {
-        fWaitingForEval=false;fSavedActivatorMsg=nil;
-        
-    }
-    plObjectInVolumeDetector(int8_t i){fType = i;fWaitingForEval=false;fSavedActivatorMsg=nil;}
-    virtual ~plObjectInVolumeDetector(){;}
+    plObjectInVolumeDetector() 
+        : plCollisionDetector(), fSavedActivatorMsg(nil), fNumEvals(0), fLastEnterEval(0), fLastExitEval(0) 
+    { }
+
+    plObjectInVolumeDetector(int8_t type) 
+        : plCollisionDetector(type), fSavedActivatorMsg(nil), fNumEvals(0), fLastEnterEval(0), fLastExitEval(0) 
+    { }
+
+    virtual ~plObjectInVolumeDetector() { }
     
     virtual hsBool MsgReceive(plMessage* msg);
 
@@ -183,15 +162,13 @@ protected:
     bool    fIsInside;
     bool    fSavingSendMsg;
     bool    fSavedMsgEnterFlag;
-    int     fNumEvals;
-    int     fLastEnterEval;
-    int     fLastExitEval;
 
     virtual void ITrigger(plKey hitter, bool entering, bool immediate=false);
     virtual void ISendSavedTriggerMsgs();
-    virtual void IHandleEval(plEvalMsg* pEval);
 public:
-    plCameraRegionDetector(){ fIsInside = false; fSavingSendMsg = false; }
+    plCameraRegionDetector()
+        : plObjectInVolumeDetector(), fIsInside(false), fSavingSendMsg(false)
+    { }
     ~plCameraRegionDetector();
 
     virtual hsBool MsgReceive(plMessage* msg);