UPDATED:
So I've just done some testing, and it appears this bug is causes by importing images via Bridge's 'Get Photos from Camera'.

I just imported over 1000 Raw files from a Nikon D3 from multiple shoots, the only difference was that I copied the files directly from the CF cards.
The 'File Info' Tab function as normal with these files, however if I import the same files using 'Get Photos from Camera' then File info crashes as written below.

It DOES not appear to be camera specific as I first thought, it was that I only used the 'Get photos' option with that camera.

I process a lot of images from many different cameras.
Recently (2 months) after one of the updates to Bridge, I have begun to experience crashes with attempting to edit Metadata of multiple selections using 'File Info' (via right mouse click).

I cannot seem to find the specific cause, but it seems to be specific to Nikon D3 RAW files, whether they are in original .NEF format or converted to .DNG via Bridge's 'Get Photos from Camera' option, or even the DNG convertor.

It works fine on one image, but 95% of the time if I select multiple files, Bridge crashes.

Strangely but rarely it still works for some D3 files imported along with those that don't?