I believe this happens when you are using the Java pop up - try getting an IRC client instead, and that should solve your problem.
Check out This Thread to see other tfper's who had the same issue, and Spec's helpful answers  : http://www.tfproject.org/tfp/showthread.php?t=93989
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Calling from deep in the heart, from where the eyes can't see and the ears can't hear, from where the mountain trails end and only love can go... ~~~ Three Rivers Hare Krishna
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