Another aspect to this bug - if you later add more files to your music directory, then do Library -> Rescan Library, the new files aren't listed in the library view. The only way to get them to show up is to delete ~/.mixxxtrack.xml manually, and Mixxx will then do the rescan the next time it is started.
Another aspect to this bug - if you later add more files to your music directory, then do Library -> Rescan Library, the new files aren't listed in the library view. The only way to get them to show up is to delete ~/.mixxxtrack.xml manually, and Mixxx will then do the rescan the next time it is started.