>>The last few days I'm expiriensig problems wit UT when I try to post message. The frame with message just goes blank after I hit send button. I cleared IE cache, rebooted my PC but it keeps comming back from time to time. It's also results in the duplicate postings when I hit Back and Send buttons again and again.
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>I don't know what causes that reaction.

As you can see I'm not the only one expiriencing this problem (hint, hint).