If you choose to not review your partitioning results and autopartitioning fails, the disk druid screen is not properly unskipped so that you can fix it which leads to a traceback.
Fixed in CVS
*** Bug 58567 has been marked as a duplicate of this bug. ***
*** Bug 61438 has been marked as a duplicate of this bug. ***
*** Bug 59667 has been marked as a duplicate of this bug. ***
*** Bug 67063 has been marked as a duplicate of this bug. ***
Is this supposed to be fixed in 7.3? I get the same problem when I make a kickstart install with "interactive" and no partitioning configured (on purpose since I don't want ks to partition my drive, I want to do it manually)