I encountered the same issue. First the message 'The resize operation is impossible' appears. Then, when I select manual partitioning, nothing happens but the busy mouse cursor.
It does it on 2 different computers. Bug 57989 seems related. ** Attachment added: "kaleo's messages log" http://librarian.launchpad.net/4215019/messages -- The resize operation is impossible https://launchpad.net/bugs/58500 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs