Unable to login

I have 13 WP blogs. 10 of the 13 are fine, but 3 are having the same issue.

Tonight I went through the process of updating them all to version 2.6.2. Some of the sites were having the admin/login issue exposed in 2.6.1, some had older versions and some were just not affected. The interesting part is, NON of my sites have the “anybody can register” setting set.

So, on 3 of the sites I’m still not able to log in to the admin section. Here’s a list of things I’ve done:
– Uploaded 2.6.2 files
– Updated wp-config.php with the 3 new key values
– Deleted a user from my database that showed up today that I didn’t create myself.

When none of that worked, I tried some other things:
– Set the db_version variable back a version to try and force a database upgrade. (never gets to the upgrade screen)
– manually edited the admin password using an encrypted version from one of the other sites. (again, no help)

At this point, my sites are all working properly on the front end, it’s just the admin sections that are fubar.

Anybody have any suggestions? If you need me to further explain anything, please let me know.

Thanks.