I have just uploaded all the files to upgrade to WordPress 2.5. My blog works (as far as the non-admin front end). But when I go to log into my admin panel I get this error:
Fatal error: Call to undefined function: wp_register_sidebar_widget() in /mnt/gs01/herd04/37124/domains/mydomain.com/html/wp-admin/includes/dashboard.php on line 31
I have made the attempt to try a few suggestions that have been posted about this same issue so far to no success.
I have updated my database, and I have deleted the wp-admin folder and cleanly uploaded the updated version, still no joy. I can go this weekend without being able to log in, but I would like to be able to ASAP.