I had the same effect with Dapper. Not only the partition table was dead, but also the partition filsystem was broken: I couldn't find NTFS partition using gpart and TestDisk rescue tools, which greps through the disc searching for the characteristic partition start patterns.
-- Partition table destroyed when resizing NTFS https://launchpad.net/bugs/48229 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
