I upgraded from 5.1 to 6.0 today and everything seem okay, except I can't login. Thought maybe it was cookie related, so I deleted all cookies and that didn't seem to matter...
The photopost is at:
http://www.tincantourists.com/photopost/
I also tried to register with a new userid/password and registration worked (checked the database and it was there but I still couldn't logon with it.
Any hints on what might be going on?