It seems about the same time as the new DLC comes out, a new patch will come out. Those patches sometimes hurt more than help, at least in the initial version. I'd recommend checking the forum to see how well recieved it is before downloading it yourself. It apparently saved me from a couple of issues when honest hearts and old world blues were released. If there is a problem, it's usually solved pretty quick, but it can be a game halting issue for some.
Is there a specific issue your hoping gets patched?