I've gotten this freeze mentione here; /139/f3/127077/1.html
I'm not sure how to properly reproduce it eithre, Torley (working on it) but I've found out how to "unfreeze" it, if it's a bit clumsy to do.
Hit ESC until your chat window closes. Hit RETURN to open the chat again. TAB completly through the chat selections (ie History, the chat window, Shout, etc) until you come back to the chat window. RETURN to close the chat window. TAB over menu bar selections until you highlight the "frozen" selection. RETURN to close and "unfreeze" this selection.
As I said, clumsy, but it has worked to "unfreeze" every time I have gotten a "frozen" selection.
You may wish to pass this on to whomever is working on this bug.
~Jessy