Hi there.
Here are a couple of bugs.
Selection won't workGoes for all kinds, even select-all and is object-specific. The workaround I have found is to drop and then go up one subd level, or to add a new level. After doing so, selection will work fine again for that object. This happens very frequently. I can still sculpt those meshes, just not perform selections on them. I have a feeling it might be objects I don't modify in mudbox but are static subdivided parts of the scene like armor pieces and such.
"Unfreeze all" critical problemXP32: I get an "An unknown error has occured..." message, and can continue working on the model
XP64: Unfreeze crashes mudbox like in the screenshot below.
EDIT: Invert freeze crashes on XP32, same as in the screenshot
This happens regardless of whether anything was frozen to start with. This doesn't happen when I load a clean scene with the mudbox head model.
Let me know where, and I'll send you a file that illustrates both problems.
System specs
XP32 SP 2 / XP64 SP2 (Recent install, very stable)
Intel Core 2 Duo E6600 2.4GHz
4GB
GF 8600GTS 256MB