Moved stuff around a bit in PK3Reader. Will it fix random crashes? I dunno, a least I was no longer able to trigger them...
Recompiled SharpCompress library using VS 2008, so it no longer references .net 4.0 stuff. Will it fix random crashes? See above.
Draw Settings panel: added "All" buttons to "Fill Selection with Textures" and "Remove Textures form Selection" groups
Export to .obj: fixed a crash when trying to export an unsaved map.
Texture preview are now created ~25% faster.
MissingThing icon is now used when the editor is unable to load thing sprite.
An error is added to error logger when the editor is unable to load thing sprite.