Comment 18 for bug 45989

This bug was still a problem long after UUIDs started being used (before Karmic). For a serious bug to exist for 4.5 years and then be marked invalid based on an assumption doesn't indicate a very good respect for the average user's ability to have a bootable system. You can see from the comment above that there are problems in the 2009/10 releases as well. Additionally, one of the parts of this bug is that the second disk is chosen, and the MBR is written on the first disk. Unless the disk ID changes during the installer's progress, this would not be solved by UUIDs.