cdrom and freebsd 8.0-rc1

Hi,

This is  quite strange, but this is what I'm getting:

gbsd# mount /cdrom
gbsd# ls -al /cdrom/
total 687895
dr-xr-xr-x   2 root    wheel       2048 Oct  7 11:02 .
drwxr-xr-x  25 root    wheel       1024 Oct  7 11:30 ..
-rw-rw-r--   1 ggajic  black  704400540 Oct  7 02:04 2.avi
gbsd# umount /cdrom
gbsd# mount /cdrom
info: [drm] Loading R300 Microcode
info: [drm] Num pipes: 4
g_vfs_done():acd0[READ(offset=32768, length=2048)]error = 5
mount_cd9660: /dev/acd0: Input/output error
gbsd# mount /cdrom

Until I reboot computer I can't mount cdrom back..
FreeBSD gbsd.interex-pla.net 8.0-RC1 FreeBSD 8.0-RC1 #0 r197801M: Tue Oct 
6 10:32:11 CEST 2009 
root_at_gbsd.interex-pla.net:/usr/src/sys/i386/compile/GENERIC  i386

regards,
gg.