Bootstrap Inputs on safari 6 not right?

I'm having a problem with Twitter Bootstrap Inputs showing correctly on safari 6.0.

Im pretty sure this was fine before I moved to Mountain Lion, and it does seem to be an issue with Chrome.

Basically in Safari, the right end of the input seems cut off an is not displaying correctly. Ive taken a screen shot to demo what I mean...

Safari:

Chrome:

Any ideas?

EDIT: Just looking at the Twitter Bootstrap site and I see that alot of their inputs have the same problem! Anyone else seeing this?