With 2.4.0-test11, I am unable to access to the content of CDROMs. For example:

  root@madison:~# mount /cdrom/ ; df ;ls -la /cdrom ; umount /cdrom/
  Filesystem           1k-blocks      Used Available Use% Mounted on
  /dev/scsi/host0/bus0/target0/lun0/part2
                         1014990    893570     68975  93% /
  /dev/scsi/host0/bus0/target0/lun0/part1
                          508647    363802    118571  76% /usr/share
  /dev/scsi/host0/bus0/target0/lun0/part4
                          494423    437471     31415  94% /home
  /dev/scsi/host0/bus0/target3/lun0/cd
                          658882    658882         0 100% /cdrom
  total 0
  root@madison:~# 

and the following lines show up in a xconsole window:

  Nov 22 14:08:30 localhost kernel: VFS: Disk change detected on device sr(11,0)
  Nov 22 14:08:30 localhost kernel: ISO 9660 Extensions: Microsoft Joliet Level 1
  Nov 22 14:08:31 localhost kernel: ISO 9660 Extensions: RRIP_1991A
  Nov 22 14:08:31 localhost kernel: _isofs_bmap: block >= EOF (559939584, 4096)

I have just verified that this problem did not occur with
2.4.0-test10. 

Chris

-- 
"Man is distinguished from all other creatures by
the faculty of laughter."
- Joseph Addison