I had to switch to "Adium" because Hangouts doesn't track all of my messages. There is no "sync" button. And I couldn't find a way to refresh the screen. A co-worker IM'd me a message and when I looked inside of gmail/hangouts on my PC it wasn't there. However, hangouts on my tablet had the message. I guess I could have e-mailed the message to myself. Or I could turn off my tablet so it would stop getting messages. However, if the message ended up on my phone, what am I supposed to do turn off my phone? Why can't their client either have a refresh/sync button or manage multiple Clients?