The question Experienced PHP developer, please RATE my code received 4 downvotes - it was 5 until I looked at the FAQ and discovered that there is no mention of codereview.stackexchange anywhere in it.
The OP has a history of asking questions that are acceptable on SO, so far as I can see he has never previously received a downvote for one and he certainly has no other questions with a negative score - suggesting he has at least glanced at the FAQ. He has just lost some of the little rep that he has through what is arguably no fault of his own.
Can we add a mention of CR to the "What kind of questions should I not ask here?" section, with the links to SU, SF etc?