diff --git a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFile.cpp b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFile.cpp
index 71772933..fe2adade 100644
--- a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFile.cpp
+++ b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFile.cpp
@@ -6,8 +6,11 @@
 #include <algorithm>
 #include <string.h>
 #include <ctype.h>
+
 #ifdef WIN32
 #include <windows.h>
+
+extern "C" IMAGE_DOS_HEADER __ImageBase;
 #endif
 
 //-----------------------------------------------------------------------------
@@ -151,7 +154,7 @@ private:
 			parse( 'H' );
 			char buf[256];
 			m_file.readString( buf, sizeof(buf) );
-			segments.add( MapFileEntry(seg,offs,len,buf) );
+			segments.add( MapFileEntry(seg,offs,len,buf,0) );
 
 			// break at empty line
 			if ( nextLineEmpty() )
@@ -212,8 +215,9 @@ private:
 				entryname = newName;
 			}
 
+			long rvabase = m_file.readHex();
 
-			entries.add( MapFileEntry(seg,offs,0,entryname) );
+			entries.add( MapFileEntry(seg,offs,0,entryname,rvabase) );
 
 			// break at empty line
 			if ( nextLineEmpty() )
@@ -271,26 +275,21 @@ int MapFile::line() const
 
 int MapFile::findEntry( long addr ) const
 {
-	for ( int j = 0 ; j < segments() ; ++j )
-	{
-		const MapFileEntry& segment = getSegment( j );
-		long section = segment.section();
-		long segmentBegin = loadAddress() + (segment.section() << 12) + segment.offset();
-		long segmentEnd = segmentBegin + segment.length();
+#ifdef WIN32
+	// Cope with Windows ASLR. Note that these operations are not commutative.
+	addr -= (long)&__ImageBase;
+	addr += loadAddress();
+#endif
 
-		if ( addr >= segmentBegin && addr < segmentEnd )
-		{
-			for ( int i = entries()-1 ; i >= 0  ; --i )
-			{
-				const MapFileEntry entry = getEntry( i );
-				if ( entry.section() == section )
-				{
-					long entryAddr = loadAddress() + (entry.section() << 12) + entry.offset();
-					if ( entryAddr <= addr )
-						return i;
-				}
-			}
-		}
+	// The code before ASLR-proofing tried to compute things by segment.
+	// It didn't work for whatever reason, so here's something simpler
+	// by address. Just be sure to toss anything larger than the
+	// highest address we know about.
+	if (addr == 0 || addr > getEntry(entries() - 1).rvabase())
+		return -1;
+	for (int i = entries() - 1; i >= 0; --i) {
+		if (getEntry(i).rvabase() <= addr)
+			return i;
 	}
 	return -1;
 }
diff --git a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.cpp b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.cpp
index 6b4915c0..6834de99 100644
--- a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.cpp
+++ b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.cpp
@@ -12,14 +12,16 @@ MapFileEntry::MapFileEntry()
 	m_sec = 0;
 	m_addr = 0; 
 	m_len = 0;
+	m_rvabase = 0;
 	m_name[0] = 0;
 }
 
-MapFileEntry::MapFileEntry( long section, long offset, long length, const char* name )
+MapFileEntry::MapFileEntry( long section, long offset, long length, const char* name, long rvabase )
 {
 	m_sec = section;
 	m_addr = offset;
 	m_len = length;
+	m_rvabase = rvabase;
 
 	strncpy( m_name, name, MAX_NAME ); 
 	m_name[MAX_NAME] = 0;
@@ -45,6 +47,11 @@ const char* MapFileEntry::name() const
 	return m_name;
 }
 
+long MapFileEntry::rvabase() const
+{
+	return m_rvabase;
+}
+
 bool MapFileEntry::operator<( const MapFileEntry& other ) const
 {
 	if ( m_sec < other.m_sec )
diff --git a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.h b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.h
index 74b8e93e..b7414651 100644
--- a/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.h
+++ b/Sources/Plasma/FeatureLib/pfStackTrace/pfMapFileEntry.h
@@ -21,7 +21,7 @@ public:
 	MapFileEntry();
 
 	/** Creates an entry with specified section, offset, length and name. */
-	MapFileEntry( long section, long offset, long length, const char* name );
+	MapFileEntry( long section, long offset, long length, const char* name, long rvabase );
 
 	/** Returns section of the entry. */
 	long		section() const;
@@ -35,6 +35,9 @@ public:
 	/** Returns name of the entry. */
 	const char*	name() const;
 
+	/** Returns the location of the entry. */
+	long		rvabase() const;
+
 	/** Returns true if the offset of this entry is before the other one. */
 	bool		operator<( const MapFileEntry& other ) const;
 
@@ -43,6 +46,7 @@ private:
 	long	m_addr;
 	long	m_len;
 	char	m_name[MAX_NAME+1];
+	long	m_rvabase;
 };
 
 
diff --git a/Sources/Plasma/FeatureLib/pfStackTrace/pfStackTrace.cpp b/Sources/Plasma/FeatureLib/pfStackTrace/pfStackTrace.cpp
index 4fbadaf1..fd8d0524 100644
--- a/Sources/Plasma/FeatureLib/pfStackTrace/pfStackTrace.cpp
+++ b/Sources/Plasma/FeatureLib/pfStackTrace/pfStackTrace.cpp
@@ -6,6 +6,8 @@
 
 #pragma optimize( "y", off )
 
+extern "C" struct IMAGE_DOS_HEADER __ImageBase;
+
 //-----------------------------------------------------------------------------
 
 #define MAX_DEPTH 32
@@ -155,9 +157,14 @@ int StackTrace::printStackTrace( MapFile** map, int maps,
 		else
 		{
 			const MapFileEntry &en = entryMap->getEntry( entry );
-			long entryAddr = entryMap->loadAddress() + (en.section() << 12) + en.offset();
+			long entryAddr = en.rvabase();
+			long stackAddr = addr;
+#ifdef WIN32
+			stackAddr -= (long)&__ImageBase;
+			stackAddr += entryMap->loadAddress();
+#endif
 
-			sprintf( buf+strlen(buf), "%s (0x%08X + 0x%08X)\r\n", en.name(), entryAddr, addr - entryAddr );
+			sprintf( buf+strlen(buf), "%s (0x%08X + 0x%08X)\r\n", en.name(), entryAddr, stackAddr - entryAddr );
 		}
 
 		// append temporary buf to output buffer if space left