The sync_plugin field is there, and populated with my server.
There was a second entry in there from when I tried the workaround, but I removed it.
guild_id 1
guild_name Twisted Mayhem
sync_plugin Bladefist
lastSync 4/20/2012 21:46
params (edited out due to length)
guild_id 2
guild_name Twisted Mayhem
sync_plugin wow_armory
lastSync (empty)
params (empty)
http://wowtwistedmayhem.com/images/raidplanner.png