I can reproduce this on multiple Fedora machines and with either plugin mentioned.
Launching from the command line reveals some nasty GTK2 errors. If it's not just me, I'll bugzilla it if not done already.
-Rick -- Rick Johnson, RHCE #807302311706007 - rjohnson@xxxxxxxxxx Linux/Network Administrator - Medata, Inc. PGP Public Key: https://mail.medata.com/pgp/rjohnson.asc