only change since -0.4.rc1 is:

• Fri Aug 7 2009 Mark McLoughlin markmc@redhat.com - 2:0.10.91-0.5.rc1
• Fix virtio_net with -net user (#516022)

this is a regression which totally breaks libguestfs

since that's a feature we want people to test in F-12 alpha, it'd be nice to
get it in if there's still time

Tested by me, fixes the libguestfs regression and hasn't seemed to cause any
other problems