Crusader Kings II v1.04c Patch

Available via in-game autoupdater
Paradox Interactive today issued a new patch for Crusader Kings II, fixing a random "freeze" issue that could occur during normal gameplay, as well as a problem with white looking terrain on certain graphics cards. Also, the console command "observe" should no longer crash the game. A playable demo can be found here.
Update: the patch is now locally mirrored (thanks: The Patches Scrolls).