I currently can not see any text I send in a chat box. I don't know if it's vice versa.
(Crazy Jay, this is when I sent you some messages over the game. I don't know if you could see them :p)

Edit: After going into the tutorial and turning off the music, the bug seems to have....dissipated.
Poor Crazy, I just basically spammed his chat box XD

Double Edit: Just finished a match (I challenged a buddy) and this bug is back, then he went offline, and I could once again, see my chat.

I have another bug to do with the chatbox, thus the bump.
When writing a long message (well, not really long, but long enough to go on a second line), the last word gets cut-off a bit, IF the scroll bar is there.
Also, it's autoscroll is keep up(or down) with the chat, doesn't scroll all the way down with the chat.