Upgraded from 1.0.7 to 1.1RC2 and now users can't log in

[bjf123]

I installed the upgrade to go from 1.0.7 to 1.1 RC2 on this forum today.  I got no error messages during the upgrade.  After the upgrade, this error message appears when anyone tries to log in.  However, if you click Back after seeing this, you sometimes are logged in.  I've checked the error logs in SMF and nothing appears there.

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/1.3.34 Server at www.musketeerfootball.com Port 80

[青山 素子]

Do you have access to the webserver error logs for your site? Those are often very helpful. I also suggest re-uploading the files in the Sources directory.

[bjf123]

I checked the error logs in cpanel, and those only showed that I have no favicon.ico, 404.shtml, and 500.shtml files.  I have reuploaded (is that a word?) the Sources directory.  Same problem.

Edit - Is there a way to go back to 1.0.7?

[青山 素子]

If you made a database backup, re-upload the 1.0.7 files and then restore the atabase backup from before the upgrade.

[bjf123]

After having upgraded two other sites with no problems, I, of sourse, skipped any backups this time.