When I first added my mp3s it seemed like the Music app scanned my SD card to find music files and built a library that way. Cool. Now I've deleted some albums from the SD card (going through a music catalog re-organization) but the Droid still lists them in the library. Any ideas on how the library can be re-built? I went into app manager and tried deleting all of the settings for the music app but that didn't work.