HELP! Unity 4.3 Crashes while importing small assets

So I just upgraded my Unity from 4.2.0 to 4.3 yesterday. After the installation complete, I launch unity and upgrading my project, it’s all fine, but when I want to open another project, I upgrading my project without backing up (I forgot). The upgrading progress was fine, but when it says Importing Small Assets and then it crashed. I reopen it and it always appear.

Today, I try to open my project that has been successfully upgraded yesterday, and now it crashes while loading Unity. It crashed while Unity is loading the Unity Layout (It’s like all white, only project, assets and inspector are visible)

Please help me

Thanks for the answers

Yup, I am experiencing the issue during the import. Luckily the whole thing isn’t crashing. That is probably because whatever asset is the problem I am not using.

I would like a solution to this because i get a bunch of warning on standard assets that I would like to update so they go away.