The export logger and export reporter have been merged together to form
an eventually much more powerful export analysis feature. For now, the
benefit is that general log messages don't have to be so fiddly with
print statements and string formatting. You're welcome.
This idiotic change was introduced in stealth mode from 2.76 to 2.77. It has something to do with 3d textures, supposedly. I think the person who made this change is simply an asshat...
Export all images right-side up. OpenGL flips them because fail, so we
have to do a bit of work to correct that. Thankfully, this operation is
not as slow as I thought.
NOTE TO SELF: remember, texture page updating would be nice to have...