Comment 12 for bug 551965

It would be interesting to confirm definitively that the different alignment is what's causing this, and not something else. I've been planning to add a preseedable option for final release that would allow you to select cylinder alignment rather than optimal alignment; while this isn't ideal, it would allow you to test this quite quickly.

The other option is to go back to cylinder alignment by default when the disk doesn't advertise anything in particular, but I'm reluctant to make that change since apparently it can cause compatibility problems with newer versions of Windows.