Description of problem: This is really hard to describe. I just wanted to install F11 over my existing F10 system. There were three existing primary partitions (Win XP, Win7, Linux /boot (GRUB)) and two logical drives in extended partition (swap and /) I didn't want to upgrade so I chosen manual disk partitioning, assigned existing partitions to /boot (EXT3) / (EXT4) and swap with formating. First time installer HUNG formatting swap (really frozen so no way to switch to textual screen) Second time everything SEEMED to be OK but GRUB didn't launch on bootup (MBR showed "Missing operating system" message. I re-checked /boot partition using live CD and it had FAT filesystem (!) Third time I got "Too many partition tables" error message although I CHOSEN 3 primary and rest in extended. Fourth time disk was OK I didexactly SAME layout every time but I played A LOT with everything (deleting and creating partitions over...) I know this is some BFM and agree it's virtualli impossible to reproduce. Just hope other users will be able to comment more precisely. MP
Without more data, we can't do anything to fix this. If anybody can update with more precise information, please feel free to reopen this bug.