There was a RAISE without a handler. The application will now exit/

Can someone help me figure this out, I can open Acrobat and run it for about 5 seconds, then this message pops up "There was a RAISE without a handler. The application will now exit." and Acrobat Pro closes.

I am running Mac OSX 10.5.8 and Acrobat Pro 9.3.3.  I have tried going back to a previous version of Acrobat but I get the same error.  I am using Firefox, someone suggested it is a Safari thing, but I have never used Safari, not sure why it would be associated anyway, but trying to give as much info as I can.

Help please?