With nautilus I can browse to the smb shares on my network disk just fine, however, their mount directories in /mnt look like empty files in nautilus, but actually they are of "unknown type" when I right click for their properties. According to mtab the shares are mounted, but ls -l gives very weird results.

What is going on and how do I fix it?

Code:
schmauck:/# cat /etc/fstab | grep smb
//spacenetwork/openshare /mnt/spacenetwork/openshare smbfs credentials=/home/daan/.spacenetwork,uid=daan,gid=daan 0 0
//spacenetwork/myshare   /mnt/spacenetwork/myshare   smbfs credentials=/home/daan/.spacenetwork,uid=daan,gid=daan 0 0
//spacenetwork/usbdisksdb1 /mnt/spacenetwork/usbdisksdb1 smbfs credentials=/home/daan/.spacenetwork,uid=daan,gid=daan 0 0
//spacenetwork/usbdisksdb2 /mnt/spacenetwork/usbdisksdb2 smbfs credentials=/home/daan/.spacenetwork,uid=daan,gid=daan 0 0
//cldata1/daang /mnt/cldata1/daang smbfs noauto,credentials=/home/daan/.cldata1,uid=daan,gid=daan 0 
schmauck:/# mount -a
mount error 13 = Permission denied
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
mount error 13 = Permission denied
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
schmauck:/# cat /etc/mtab | grep spacenetwork
//spacenetwork/openshare /mnt/spacenetwork/openshare cifs rw,mand 0 0
//spacenetwork/myshare /mnt/spacenetwork/myshare cifs rw,mand 0 0
schmauck:/# ls /mnt/spacenetwork/
myshare  openshare  usbdisksdb1  usbdisksdb2
schmauck:/# ls /mnt/spacenetwork/ -l
ls: cannot access /mnt/spacenetwork/openshare: Permission denied
ls: cannot access /mnt/spacenetwork/myshare: Permission denied
total 8
d????????? ? ?    ?       ?                ? myshare
d????????? ? ?    ?       ?                ? openshare
drwxr-xr-x 2 root root 4096 2008-12-05 19:16 usbdisksdb1
drwxr-xr-x 2 root root 4096 2008-12-05 22:58 usbdisksdb2