From what I've heard from a couple of friends in the industry (one in BioWare, one in EA), the developers test their content thoroughly, and I mean very thoroughly. But the second that DLC leaves the developer's offices and goes to Microsoft, the ball is out of their court.I III II X4 said:snip
Microsoft has its own unique way of distributing content, and a lot of times that creates problems. In this particular situation, it's a DRM issue, which is basically a system that attempts to prevent piracy.