Ive had three big problems with the latest build:

1. Exporting collions from 3ds max in .fbx format doesnt work (simply exported without the collision data)
2. Large landscapes crash on light building (known issue I think)
3. Crashes on importing skeleton meshes from 3ds max

Specs:

Win 7 64bit
Intel i7 860 2.80 GHz Processor
8gb Memory
Nvidia GeForce 9800 GT