No optical drive found.
K3b did not find any optical device in your system.
Solution: Make sure HAL daemon is running, it is used by K3b for finding devices.
I'm in the plugdev, cdrom, video, audio and disk groups, but I still get this message. Mounting the drive using mount works. The only solution that I've found for that is chmod 666 /dev/sr0, and that is not convenient, as I have to do it everytime I reboot.
The permissions are
ls -lah /dev/sr0
brw------- 1 root root 11, 0 Jun 24 03:56 /dev/sr0