I'm wondering if this has anything to do with the Chat messages that aren't showing up after typing them. I've had this particular problem in a friend's server, I'd type a message and then after clicking enter the message would not appear in the chat. A friend of mine also had this same problem. It's fairly annoying and often times I needed to type the same message a few times for it to finally go through. I had some of my friends report that the message did go through on their side, but it would not show up on mine. I'm not exactly sure if this has to do with the Dropped Chat problem Sky has pointed out or if this is even a problem at all.