I just used the WordPress Automatic Upgrade Plugin to upgrade my installation from 2.2.2 to 2.6. This was the first upgrade that I had done since an initial install of WOrdpress (whigh was done via Fantastico via my host).
The upgrade process was went perfectly. At the end of the process there is a step where WordPress investigates your database to see if you need to update it. I had to. clicked the link to do so and it came back as stated that it was updated successfully.
My blog is running, I seem to see all of my posts and comments. However there is an issue with my categories that is a bit strange. I can see no text for the categories but I can see the comma's separating them for each post. In the Dashboard it denotes that I have 12 cetegories (which is correct) and in the Manage->Catagories tab I see 12 blank catagory descriptions but there are correct listings of the numbers of post associated with each one.
Any clues what could be going on? Maybe a glitch in the DB update?