I migrated my Drupal site to a clean new box - installed apache, PHP, etc., replicated my db, changed Drupal's settings.php to point to the right db, and upgraded 6.6->6.10 just fine (so I thought), but after logging out of the site, I can't log back in under any user account. I did check other forum posts for any clues and googled for other similar problems, but haven't gotten anywhere.
When I enter the user name and password into the login fields and submit, the fields reset to be blank again.
The public areas of the site are fine, the theme works, images display fine, etc so I know the connection to the db is fine and the site is working otherwise. SSL is enabled and gives me the right cert, and CleanURLs is not installed. I'm an apache newbie, but I'm pretty sure I configured the VirtualHost directives correctly.
I've tried multiple browsers so I know it's not a browser issue. I also know that I'm not silently being logged in because I can't access pages that an authorized user would be able to.
I've checked the logs that I can (drupal-access_log and drupal-error_log) and I don't see any errors there but I'm not sure where else to check. I am an SQL n00b so, while I have access to the database, I'm not sure what to look for or change.
CentOS 5
Apache 2.2
Drupal 6.10
mySQL 5