Problem with ls and cdrom drive

I just discovered what seems to be a problem with ls. This is what I did:

> cd /mn/dvd
> ls

The CD inside my CD-ROM drive seems to cause some problems, because I get the
following error message:

acd0: FAILURE - READ_BIG HARDWARE ERROR asc=0x08 ascq=0x03 error=0
g_vfs_done():acd0[READ(offset=69632, length=2048)]error = 5

This happens quite often, but I can read the CD without any problems. The funny
thing however is that `ls` behaves not like it should. Instead of listing the
directory contents it recurively lists the contents of the current AND all the
subdirectories. The output is the same as `ls -R`.

This only happens when I cd to /mnt/dvd and enter the `ls` command very fast
(before the prompt displays the new directory)..
Was this problem solved already?

I'm running 6.0-BETA4 FreeBSD 6.0-BETA4 #0: Wed Sep 14 00:54:49 CEST 2005