Mass Effect Andromeda won't release until tomorrow, but that hasn't stopped Bioware from patching the game a little early.
Patch 1.04 includes various bug fixes and stability improvements - though that's a little vague, it sounds like this is mostly aimed at PC users and multiplayer fixes.
Bioware Producer Fernando Melo had the following to say on the patch, and advised that PC players in particular should make sure they pick it up (console players probably won't have much of a choice in the matter):
There are also some server-side fixes coming - apparently, some challenges weren't completing properly:
Mass Effect: Andromeda releases tomorrow on Xbox One, PC, and PlayStation 4.