I upgraded recently to WP 2.2, then reverted back to 2.1.3 as it wasn't working well with my theme (K2)... then the problems started.
First of all I couldn't get into Admin, WordPress was telling me I "didn't have the right permissions", so I spoke to my host (Dreamhost) who had done the installs and to be fair have been great, but even they're stumped now!
They "downloaded and ran that force-upgrade.php script" and that enabled me to get into wp-admin, but now I only have 2 options along the top of the WP-Admin page; 'Dashboard' or 'Profile'. The other worrying thing is that the most recent posts and edits to the site don't appear to be there. On their advice I have reinstalled WP2.2 and that's reverted me to the K2 vs 2.2 problem;
Fatal error: Call to undefined function: is_active_module() in /home/.minie/trailofants/trailofants.com/wp-content/themes/k2/app/includes/info.php on line 186"
I think this has to do with a plug-in to disable the widgets in 2.2 but I can't do anything in admin due to just the "Dashboard" and "Profile" options being available. I have very limited knowledge of all this, only started in Feb 07 so I haven't done anything in the background other than use Dreamhost to upgrade, then revert, then upgrade.
If I haven't explained anything or you need me to clarify anything then please just ask as Dreamhost and I are completely stumped and we've been in contact throughout the day! My site is http://www.trailofants.com but doubt you'll see anything other than that 'fatal error'.
Here's hoping someone can help...