feisty upgrade fstab

[kramerjm-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org (James Kramer)]

I upgraded to Ubuntu feisty
The upgrade changes the /etc/fstab
I can change the fstab to the proper /dev/sd** location but I don't
understand why the UUID doesn't work
here is the fstab that Ubuntu set up for my data partition /jdata
# /dev/hdc3
UUID=9843a215-3ec3-43bd-9233-427971875b58 /jdata     ext3    defaults
      0       2

Here is the UUID for /jdata using
$ sudo vol_id -u /dev/sdb3
9843a215-3ec3-43bd-9233-427971875b58

I don't understand when I connect to /jdata it is a blank directory

I know that I can edit fstab to
/dev/sdb3  /jdata
and it will probably work, but I was wondering why the UUID doesn't work.
Just curious
jay

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