Comment 4 for bug 211455

Please note that the fix was *just* released and was not on the CD you tested with, nor do I imagine you enabled it. From the comments on bug 8497:

"I now have a grub patch that I think shuffles the devices around appropriately provided that you boot with edd=on, provided that EDD works on your hardware, and provided that the MBR signatures exposed by EDD are distinct - pretty much the same conditions as in SuSE. We can't make this the default, I don't think, but we can make it fairly easy (i.e. accessible from the CD boot menu, documented in release notes, and such) for people to use it if grub's normal autodetection gets it wrong."

Regarding the groot line, you modified your menu.lst in a manner that gave results that were explained in the very same file would occur. I was merely trying to point you at this documentation so you had an understanding of why this seemingly random result was occurring.