This is one of those riddles that goes around Myspace. I think it's hilarious how many people are oblivious to the answer, because it just shows how many people don't pay attention in school. I solved it in only 2 minutes. To quote Jigsaw, if you will SEE WHAT I SEE, the answer is right in front of you.
000
111
222
333
444
555
666
777
888
999
Who thinks they know what the error is?
000
111
222
333
444
555
666
777
888
999
Who thinks they know what the error is?