Leopard (kinda) hates Ubuntu

I ended up picking up a MacBook a few weeks ago, and I've been dual booting Ubuntu and OS X (Tiger) on it. Ubuntu's been a bit of a let-down because there's been so many quirks, and so I spend most of my time in OS X on the thing. (I still use Ubuntu on my desktop machine.)

Anyways, I got my Leopard upgrade DVD, and found a nice little surprise when I tried to upgrade: The Leopard upgrader wants to format my whole drive because it can't find my OS X partition or something. The manual and website say that I'm supposed to be able to upgrade if I used a beta version of Bootcamp to dual-boot (which I did), but apparently it wants to format my drive because I've got Linux installed instead of Windows in the other partition.

Did I mention that it wants to format my whole drive? (my old OS X partition too)

It's not like Leopard doesn't have enough problems already....

Update: Arrrrrrg, bloody Apple lingo. The installer says it wants to format my "Macintosh HD", which I forgot isn't actually my whole hard-drive (despite the HD moniker). So it just wants to format my OS X partition.... which is the one I use and store all my data on.... *sigh*