trying to install F11 from March 23 On the custom disk layout screen I select the /boot partition and click delete. It asks if I want to confirm and I said yes. The cursor turns from and arrow to a stopwatch. The cursor still works, but it should have turned back into an arrow. There are probably other ways to get it to do this, but I know it happened trying to delete a whole VG (and hitting cancel) and when I actually deleted an on disk partition.
This will be fixed in the next build of anaconda. Thanks for the bug report.