There's a new update about upcoming patches at Bethesda Blog.
A new patch for the PC should be released early next week. It will finally fix save corruption issues, as well as some problems with companions. It will also improve performance for users of NVIDIA video cards, and fix some issues with the Havok physics engine.
Meanwhile, a solution for the Xbox 360 save issues has been found, and final testing and ceritfication for a comprehensive patch for all three platforms is underway.