Now, the studio has chimed in, noting that it is "watching and listening to you, the community, and are looking into all serious issues that are bought to our attention," offering up some advice and a preventative workaround for one troubled quest.
In order to properly complete the Monk's Quest in Oakfield--and thus continue the main story--Lionhead advises players to let the monk run through his entire conversation before leaving the area for the first time. Otherwise, the monk may become unresponsive later on, which would halt story progress and currently has no solution.
As for co-op, the studio states that character progress will be wiped if "you select a save game in the couch co-op screen straight after childhood," with a forthcoming patch set to resolve the issue.
"Some things slip through the net during development, especially when a game is the size and scope of Fable II," Lionhead noted on its boards. "Again, we can only apologise for this issue, but we are doing our best."
Prior to the launch of Fable II, publisher Microsoft announced that the promised online co-op mode had not made it into the final product, but would be added back in a patch--one which just so happened to arrive on the day of release.
Thanks to Xbox 360 Fanboy for pointing out Lionhead's responses.