Profile mod seemingly causing 1.6 errors

the standard Profile mod is causing a few interesting errors on my site, after upgrading to 1.6...

The 'tool administration' page is without css formatting (irritating but workable) and the elggchat mod toolbar has been crunched into the corner of the window. I understand that the elggchat mod might not yet be 1.6 compatable, but the profile mod should surely not cause this?  Any ideas/suggestions?  I tried disabling all plugins and just enabling the profile plugin and it causes the same issues.  Hmmm...  can't work out why.