CS6 adobe bridge stuck on building criteria!!

can anyone tell me why bridge is permanently stuck on building criteria on my CS6 Adobe bridge - on my Mac

I never had this problem on my CS5 version. I never ever changed any of the default settings so something is seriously wrong with the default settings on CS6

for it to be stuck like this.

I have removed photoshop entirely and reinstalled it to try and see if i can tewak the options but it wont let me - i have to force quit to close the application

which seems to be building criteria for hours on end.

I have even left it for 24 hours to build the cache - but this did not help at all.

any ideas before i remove the whole thing and go back to using CS5!

thanks