Comment 27 for bug 723990

Without delving into this issue very deeply at all, I can say that it appears to be consistently reproducible on my test box (real hardware) if these are any pre-existing partitions on the target drive. When I make use of an unpartitoned drive (with or without an existing MBR + empty partition table) Natty Alpha3 will install fine. However any pre-existing partitions on the target drive will hang the partitioner. I primarily use the alternate iso, however I seem to get similar results on the desktop iso as well.