Odd drive (non-)partitions?

[RAOF]

Those entries should probably be there:
/dev/shm sounds like the shared-memory device
/var/lock is where programs place lockfiles. Having it mounted as a separate fs type actually sounds like a good idea (especially if it is in volatile storage - a reboot will fix lock errors. Yay!)
Not sure what /var/run is used for, but it's used for something ;)

[Sslaxx]

According to df -h:
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 26G 3.5G 22G 14% /
varrun 252M 64K 252M 1% /var/run
varlock 252M 4.0K 252M 1% /var/lock
udev 252M 188K 252M 1% /dev
devshm 252M 0 252M 0% /dev/shm
/dev/sda4 54G 5.1G 46G 10% /home
/dev/sda1 149G 7.1G 142G 5% /media/C

I can see three entries that probably shouldn't be there! varrun, varlock and devshm.

This is the fstab file:
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/sda3 / reiserfs notail 0 1
/dev/sda4 /home ext3 defaults 0 2
/dev/sda1 /media/C vfat defaults 0 0
/dev/sda2 none swap sw 0 0
/dev/hda /media/cdrom0 udf,iso9660 ro,user,noauto 0 0
/dev/hdb /media/cdrom1 udf,iso9660 ro,user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0

They do not show up here, but they do on mtab...
/dev/sda3 / reiserfs rw,notail 0 0
proc /proc proc rw 0 0
/sys /sys sysfs rw 0 0
varrun /var/run tmpfs rw 0 0
varlock /var/lock tmpfs rw 0 0
udev /dev tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
devshm /dev/shm tmpfs rw 0 0
/dev/sda4 /home ext3 rw 0 0
/dev/sda1 /media/C vfat rw 0 0

Ideas?