Description of Problem: I wanted to make some new ext3-partitions with diskdruid at the end of my disk. After deleting necessary partitions I created a / - partition. Then I wanted to create a new partition which I didn't want to have mounted, but diskdruid forced me to select mount-point. As long as I have a valid partition for my /, I think this should be possible.
Just assign a bogus mountpoint to these partitions. I do not want to relax the requirement otherwise alot of users forget to mount the partitions they are creating.