I replicated the problem installing Dapper from a live cd. There was a warning on the 43G fat32 partition. I used Partition Magic to resize it to 29G and the warning went away so I would guess that there's a problem with fat32 partitions over 32G.
-- [Dapper LiveCD Beta2] GParted shows a warning for fat32 partitions https://launchpad.net/bugs/42619 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
