I have an IPod Video that has had Rockbox loaded and was working fine at one point with FLAC files loaded onto the Ipod with J River Media Jukebox. I wanted to wipe all files off the player, which I did with J River Media Jukebox. Now, when I boot up J River it says "Device Information cannot be retrieved, please reboot your PC and retry". The player just freezes on "Building Database... 519 found (Prev to return)", so it seems like it is still finding metadata from the old files. I tried reinstalling rockbox and also restore with Itunes.