GDR2 does in fact fix the duplicate pictures in the camera roll and saved pictures album, but nope, it did not fix the duplicate songs issue for me. I have tried every method, from using the WP desktop app to sync, to manually removing the SD card and transferring on PC, to using standard drag-and-drop. None of them work and I'm seriously considering ditching my 620 and switching to Android. Very, very disappointing.