JudasIscariot: Unless they get the source code and make the games more expensive, I highly doubt they are going to be fixing other developers' games. On the other hand, maybe they can petition the developer to fix something majorly gamebreaking, like the whole Arx Fatalis deal getting a patch from Asceron.
Ghostfromthepast: Yes, i was meaning to say fix, not for them to actualy patch the game, but to manage some sort of deal like what they managed with Ascaron for Arx Fatalis. But if they had the change and means to to fix them, themselves ( without increasing the price) i would't opose. ;)
My understanding is, at least in regards to the Arx Fatalis debacle, that was not done at GOG's request at all. It was just the same code version that Ascaron had already supplied to other download services like Steam, but had yet to supply to owners of the retail cd/DVD version of the game.