Ok, this seems to be something more general. The same happened a vew minutes ago as I tried to install the Game "Dune2000":
"Unable to mount DUNE2000
Error mounting: mount: /dev/sr1 already mounted or /media/DUNE2000 busy"
This time I was able to click on the entry in the Places-Bar and after that, the Disc appeared on the Desktop.
Ok, this seems to be something more general. The same happened a vew minutes ago as I tried to install the Game "Dune2000":
"Unable to mount DUNE2000
Error mounting: mount: /dev/sr1
already mounted or /media/DUNE2000
busy"
This time I was able to click on the entry in the Places-Bar and after that, the Disc appeared on the Desktop.