I have the same issue…
When trying to access the wp-admin i get redirected to the ‘Database Upgrade Required’ page. After clicking the button i get ‘Upgrade Complete’ and then it just loops back to the ‘Database Upgrade Required’ page. I.E. I cant access admin.
I’ve tried this solution:
http://www.clickonf5.org/wordpress/solution-database-upgrade-required/2247
-It did not work, versions checks out in db & version.php
System Requirements are ok, phpinfo says:
memory_limit = 512M
Client API version = 5.1.41
Any help suggestions?
Sadly and VERY anoying is that I dont have a backup since before the upgrade…