Wrap/Column width issues

I'm noticing a couple of width issues, or wrap issues with our install of BlogsMU. We've got the latest versions of BlogsMU, BP, and WPMU

The signup page is totally unusable and obviously the most critical for us to correct. The groups descriptions are wrapping way too short, which is less critical, but is not nice to look at. Finally, the activity stream looks really bunched up – minor aesthetic problem.

Where is the hitch? How can we fix it?

Screenshots below.