Comment 3 for bug 605720

It's not clear to me whether this is a bug.

I created a test disk image in kvm of exactly the same size and followed your directions. The second partition doesn't actually extend beyond the end of the disk. It does extend one cylinder beyond the count shown by fdisk, but that's because the last sector on the disk is after the last cylinder - i.e. the last cylinder is incomplete. There's an argument that that's what you ask for by turning off cylinder mode. I don't think this bug should necessarily be closed out of hand, but it doesn't seem entirely unreasonable behaviour from a relatively low-level tool like fdisk.

Bug 569900 is going to be something different, because the installer doesn't use fdisk.