It's not the removable side of the case in the picture
At least my case is still useable, a ebay seller managed to break the rear leg of the case:http://www.ebay.com/itm/For-Parts-A...9420945?pt=Apple_Desktops&hash=item5af2bb5911
I was shopping for G5 powermacs for weeks and I saw this every time I looked. I wish someone bought it or took the listing down so I didn't have to look at it!