I've heard that it has occured in Aranyaprathet..for 30-day Visas....but such seems to be very rare and depends on the mood of the officer. Further, as regulations change daily in Thailand, I dunno if that 'rule' is still in effect.
I just came from Aran a few days ago and saw the big signs saying that you have to have proof of leaving Thailand for ex Airline ticket if you reply for a 30 days stay in Thailand (which is not a visa). My friend anyhow got a 30 days stay without problem but you never know. With a visa it should not be a problem.