Google seems to be adding words to the title links for some pages contained in the supplemental index.  I've seen this occur on four separate domains now in the past three days.  In all of these cases, the title appearing in the search results does not match the title appearing in the cache of the page, nor does it match a title tag that was ever present. 

Followup:  There is a thread on WMW that details some of the issues being seen.  Halfdeck also has a nice writeup about it on his blog.

We know with the recent story about the five million junk pages indexed in Google that the folks at the 'plex are having some issues.  Hopefully they'll figure it out sooner than later.