motris - 2011-10-17 3:38 PMOne common error is transposition in a sudoku. I got one entry I remember like XXXXXXX12 and YYYYYYY12 where the correct answer has XXXXXXX21 at the top. This could have been either a puzzle error or a typo error, but it is certainly a small/quick fix error.
That was me. That was a puzzle error. I always do that for some reason, usually with ones and twos.