I use Messages to connect to Apple account, AIM, Facebook, and Google Chat. Up until about 3 weeks ago (maybe around Yosemite upgrade?), it was rock solid. But now, while AIM & Apple accounts still stay constantly connected, the two accounts with Jabber (Google Chat and Facebook) are constantly connecting and disconnecting. Very unreliable, but only just for those two. Anyone else had this problem or a solution? Thanks!