So....32-bit software on a 64-bit CPU sometimes may not be all it's cracked up to be :) Boy, Poma, if you can't figure it out....I doubt anyone here can - I've been following your various and sundry suggestions to users closely and you are usually close to, if not on the mark.
Is this worth submitting a bug ??
I recommend that you begin to sing http://www.youtube.com/watch?v=qAzqSYQ9X9U :)
I don't particularly like that version, been singing it for weeks, on 3 different Fedora 19 64 bit systems, the problem remains, Boot either hangs for 30 seconds or fails completely, stops dead at lightdm.service, have to restart. Nothing in the logs, no hints. Roger