Cleanup your Features…
Many times, your coding, etc. SharePoint features. You’ll code something up, deploy, activate, etc.
Using WSP builder, while a convenient tool, it also leaves some orphans around. It forcibly deletes the solution leaving any place it’s activate with some “broken features”.
Fortunately, there’s a tool to help you cleanup those orphans.
http://featureadmin.codeplex.com/