If the reason it's "fixed" for Jan and Martin is that their disk drivers have been reverted to /dev/hda, I would not qualify it as bug resolved. It will then come back when your disk drivers are /dev/sda again, which they might be in a future kernel. That said, this issue will probably be solved correctly in the 2.6.22 Gutsy kernel. Until then the rest of us with /dev/sda drivers have to live with the above stop_on_shutdown workaround.
If the reason it's "fixed" for Jan and Martin is that their disk drivers have been reverted to /dev/hda, I would not qualify it as bug resolved. It will then come back when your disk drivers are /dev/sda again, which they might be in a future kernel. That said, this issue will probably be solved correctly in the 2.6.22 Gutsy kernel. Until then the rest of us with /dev/sda drivers have to live with the above stop_on_shutdown workaround.