Going to try and post this from work (IE5.5 with very restrictive security policy)...
I tried a pre-upgrade last night and after downloading 7GB of stuff over night, (don't ask me why it was that much) I rebooted.
Everything looked okay until I got an error message that said that /mnt/sysimage/... (I can't remember exactly what the error message was, sorry) what did not have enough space and needed 19MB more to install the upgrades.
Now, this system quad boots between Fedora, XP, Vista and 7 with grub being the intial boot loader giving me the option of Fedora or the Windows bootloader.
What I don't understand is why the installer (anaconda?) is having a fit about space when I have 8GB RAM and the system partitions are >10GB in size.
Any help here would be appreciated. I'll try again tonight, but I'm leaning towards doing a fresh net install instead of an upgrade.