When using Mp3tag with dual monitors I have the splash screen showing on the left (primary), then the main file dialog on the right, where I moved it last. Now I have to move every dialog that opens over to the right monitor. Now if I move it back to the left monitor, all the dialogs that I moved to the right monitor, I have to move back over to the left. This is going on all the time!
Please consider making Mp3tag multi-display friendly.