Upgrading KDE shouldn't affect your ability to mount or unmount drives... There is no chance that SuSE uses multiple names is there? I have never really looked, but I have noticed depending on the media in the drive, the cd that shows up on your desktop is different. So perhaps... just perhaps... SuSE is doing something really funky.
See if you can use YAST to delete that piece of hardware, then reboot and try to add it again. I have to admit I am kind of at a loss at this point, but it certainly could work, SuSE's software and hardware configuration is quite picky, and often times letting it install its own stuff is best.