Locked out from your gallery login? It’s the bad behavior, the antispam script that calls a bad blacklisting. There are two solutions:

1. Open /plugins/plugins.php and comment the row with require_once (followed bad bad behavior filepath). Put // at the beginning of the row. This will leave you without good spam-protection!
2. Download the new version of Bad Behavior from http://www.bad-behavior.ioerror.us/2007/12/06/bad-behavior-2011/, and replace all files but bad-behavior-generic.php in the folder /plugins/Bad-Behavior.

Next version of XodaGallery will have a seperate admin-part with its own folder and a login, no antispam script. Even if something like this happens again, in the next version you should always be able to login to adminarea. Next version will be available in january and have loads of improvements.