This bug was filed automatically by anaconda.
Created attachment 331986 [details] Attached traceback automatically from anaconda.
Created attachment 332505 [details] similar traceback Another traceback, this time when selecting the first partition in the "custom" partition screen.
Created attachment 332506 [details] output of parted /dev/sda print all
Richard - that's a separate traceback that should be fixed by an updated pyparted from just the other day. If not, we just need to rebuild. Anyway the underlying cause here appears to be pretty straightforward and should be fixed in the next build of anaconda. Thanks for the bug report.