Problem with username in chat window.

[Krzysztof Żuraw]

Hello,
I have some issue with my username in chat window.In Facebook chat persons
that I talk to have normal nicknames, but my name is full with
"@chat.facebook" and some letters after. What I can to don't have this
issue any more? I attached a screenshot with my problem.
http://i.imgur.com/TokO6.jpg
-- 
Best regards
Krzysztof Żuraw
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