seems to me as if f28 has become unusable on non-pae systems.
At least, an attempt to upgrade my PIII from f27 (functional!) to f28
ended up with numerous segfaults, originating from cron, mount.nfs,
automount and NetworkManager (and likely more) all similar to this:
...: segfault at bf44bfc4 at b79e35ac sp bf44bfc0 error 6 in
I currently don't have any time to investigate any further, but my gut
feeling is RHBZ#1482798 might have returned.