I recently started using Spare Parts to monitor my battery and network usage, and I've noticed that the Facebook application seems to be using an inordinate amount of "Network usage" given the settings I have. I don't have a Facebook account under Accounts and Sync and within the application itself the "Refresh interval" is set to Never and "Notifications" are set to Inactive.

Even with those settings, this is my Network Usage report from Spare Parts since taking my phone off the charger six hours ago - I have not opened the Facebook application since then. Is there anything else that could be allowing this application to update itself?