Problem with text in unity window, gets bold and blurry, imposible to use

Hi, I just started using Unity3d and it seems like an awesome game engine.

However, as soon as I imported a model, all of the txt in the unity window become bold and impossible to read. When I clicked on other parts of the window, text in those parts also changed type.

What can I do to resolve this?

I am running Mac OSX 10.5.8 and using Unity 3d 3.1.0f4

I have restated unity and it works for a little while, but as soon as I click on the model, it usually gets messed up.

Plz look at these screenshots:

BEFORE I click on the model: http://fumpr.com/share-9131_4D164C64.html

after I click on the model: http://fumpr.com/share-8DBA_4D164C64.html

after I click elsewhere in unity3d: http://fumpr.com/share-AB1C_4D164C64.html

I would really appreciate your advice.

Rishi

 

I am really confused. I have tried restarting/reinstalling Unity3d several times. Any ideas?