orkut tricks and unknownvitals..check out..

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u can change ur name to a blank one or with unknown characters ..procedure is... press alt and type 1 2 3 4...9 and see. remember press and release alt ....that is alt+1 release..u can type unknown characters.. i think the bug is captured by orkut..the bug for blank space but u can type unknown characters except blank space.. try it..dudes;;;