
Doorlock Homes: "Another case solved, Watkins! Ga-a-ad. How do I do it?"
Dr. Watkins: "I d-d..d-d..don't know ..."
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Apparently, when Warner took 2001 from MGM, they also "inherited" MGM's unsold stock of DVDs ... and either before or after the first run of their DVD pressings, Warner put all the old MGM stock into their new packages for sale. So, look at the disc before you buy based on the box.
Here is the 1998 MGM DVD package on eBay [go to link for zoom-in views]:

http://www.ebay.com/itm/Rare-DVD-2001-A-Space-Odyssey-MGM-1998-/301630969880?orig_cvip=true
Here is the deceptive 1999 Warner DVD [w/1998 MGM DVD] package on eBay [go to link for zoom-in views]:

http://www.ebay.com/itm/2001-A-Space-Odyssey-DVD-Stanley-Kubrick-Collection-/131457678683?orig_cvip=true
Zoom-in at eBay and look at the 1998 disc's MGM logo in the 1999 Warner package. Ouch. Class-action law-suit anyone?
The true Warner 1999 DVD disc has the "WB" logo and this picture for it's background photo:

I'll post a similar picture set as soon as one also appears on eBay.
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Spaced Ranger said:
... here, on the Warner 1999 DVD region-1 release ... is this disc's movie-files listing from Windows Explorer:
VTS_01_1.VOB 1,048,574 KB 11/02/1999 06:16 PM
VTS_01_2.VOB 1,048,574 KB 11/02/1999 06:21 PM
VTS_01_3.VOB 1,048,574 KB 11/02/1999 06:25 PM
VTS_01_4.VOB 799,458 KB 11/02/1999 06:27 PM
VTS_01_5.VOB 1,048,574 KB 11/02/1999 06:31 PM
VTS_01_6.VOB 1,048,574 KB 11/02/1999 06:36 PM
VTS_01_7.VOB 1,048,574 KB 11/02/1999 06:40 PM
VTS_01_8.VOB 430,240 KB 11/02/1999 06:43 PM
Here, on the MGM 1998 DVD region-1 release, is this disc's movie-files listing from Windows Explorer:
VTS_01_1.VOB 1,048,256 KB 07/16/1998 04:02 PM
VTS_01_2.VOB 1,048,188 KB 07/16/1998 04:06 PM
VTS_01_3.VOB 1,048,332 KB 07/16/1998 04:10 PM
VTS_01_4.VOB 1,048,564 KB 07/16/1998 04:14 PM
VTS_01_5.VOB 1,048,344 KB 07/16/1998 04:18 PM
VTS_01_6.VOB 1,048,530 KB 07/16/1998 04:22 PM
VTS_01_7.VOB 1,048,426 KB 07/16/1998 04:26 PM
VTS_01_8.VOB 185,190 KB 07/16/1998 04:27 PM