How does one stop those Yahoo email notifications on iChat? Through a Jabber service, I'm able to use iChat to connect to Yahoo IM server. But, I keep getting these really annoying email notificaitons (they look like chat windows) and I want to turn them off. In Yahoo Messenger for Mac, I'd turn off that preference to notify about email, but in this case, iChat does not have that preference. Any helps much appreciated. Thank you!