Four days since the official StarCraft 2 release, Blizzard has issued the first patch for the game.

StarCraft II: Wings of Liberty - Patch 1.0.1

Bug Fixes
- Campaign saves have been optimized.
- Fixed an issue with sound not playing on some 7.1 systems.
As you can see, there are no balance changes, just some minor fixes.

Links
Battle.net - Source