Initially after updating from 3.5.1 to 3.5.2 I was unable to access the dashboard this became more and more flaky as time went on. I was still able to access through other items on the Dashboard dropdown.
So I thought that the upgrade to 3.6 may resolve this issue. It appears not. The issue still exists. Since then I have read some of the suggested work arounds like updating the database version number or the missing upgrade.php file but these are obviously now all upgraded to 3.6.
As an admin I can still work round not being able to access the dashboard however my users will have issues. I have a backup I took before I moved to 3.6 so I am looking for some advice to resolve this rather annoying issue.
This is the first time I have had a real issue with a WordPress upgrade but it is quite a pain. Any advice is welcome.