I use Mageia 3 KDE, 32 bit, after 2 previous distros. Never had this kind of problem with any Linux before, regardless which distribution it was (mostly KDE versions).
After inserting dvd in drive, any containing hidden file or folder can be seen, if "show hidden files" is checked in dolphin. After removing and insering the same or other disc that contains hidden files or folders, nothing can be seen, although the option in dolphin is still active and refers to current folder. I tried all setting in view properties, but nothing changed. It works properly only after rebooting, and only with first disc inserted.