Hey!
From 3.0.0f1 → I’ve been having weird issues with UVs corrupted when imported to Unity. Rather randomly part of UVs collapse and appear corrupted (one uv is merged with another instead of as it should be), checking on maya everything looks fine and is fine but in unity its broken. Then if I delete those faces and resave, the same area might be fine but some other area corrupted.
Also I noted the beta is screaming for me to upgrade FBX importer to 2009.3 (if I remember right) version as I had 2009.1 but now I’m no longer even able to import stuff to project. Unity will stop responding, not crash, just doing nothing at all.
This happens even with completely new project with nothing selected for importing at the beginning. And only with maya files (yeah, fbx related :)). I also tried newer 2011.X version which didn’t make any difference. I’ve tried on both 3.0.0f1 and 3.0.0f4… also I can’t import anything on older version :<
I can’t remember seeing a bug report like that. Have you submitted it? If so what was the case number?
Where do I drop the bug report in? 
I can’t be sure as I do not have the beta, but I think it’s in the file/edit/view top menu in Unity, possible in the help tab. Something like a submit bug button. Unity sends a package with the recent errors and data that can be of use to the devs for debugging, so be sure to recreate the error if possible and then send it.
Hope that was somewhere near the mark 
Also be sure to clear any history on your mesh before you export to Unity
Fourthings is right. It’s “Help/Report a bug”. Then you should get an email with the case number (please post it here or send it to me in PM).
It is recommended to use FBX 2011 plugins for Unity 3.0.
Fourthings - Thanks! Found it
Paulius - I did install FBX 2011 and it caused things to go even worse haywire as I could no longer import meshes without Unity freezing completely. I reinstalled all FBX versions, uninstalled maya and reinstalled it and its working as it did before, with corrupted mesh, but I can import files to unity without freeze
Case number 375902
Problem found.
Well from unity side at least, but probably mesh related. When I tag ‘swap uvs’ from import settings, the UVs appear fine in unity.