They used to, but i think its fixed now.
My friend also got a 600t, and he pointed out some problems. First, the fans are rally bad. Whats even worse, the front fans are a different thickness so you can't replace them. Also, the fan controller is really bad. Incrediably inaccurate.
I don;t remember exactly what the other problems were, but it is a good case, However, there are better cases, such as the 650d