Multi-homed tasks are also not working with google calendar sync. eg if I add a task to another list and then sync that space (for that list) to google calendar the multi-home tasks do not show up in google calendar.
Also I'm seeing a lot of inconsistencies in sharing of tasks that are multi-listed. eg if I add a task to a second list (and both lists are shared with another user), he will see the task in its original list, but not in the second list. This is particularly noticeable when the second list is shared without sharing its parent space or folder.