I don't see that problem on my own local test installation using:
mojoPortal from SVN @ rev number 544, built using MonoDevelop
Mono 1.1.9.2
Fedora Core 3
Since we are using the same version of Mono, it seems unlikely that is the problem.
FWIW, in trying to reproduce the problem, I ran into a separate problem where I couldn't register because the "I Agree" link wasn't working. I decided to punt on that problem for the moment, and just tested the profile page with the admin@admin.com account.