User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-186.220.17.112-20130410153742/@comment-198.91.10.183-20130411023147

For me, it only crashes on the savegames that have been "double-dipped" in the patched game. In other words, when I installed the patch and loaded a savegame, it worked fine. When I unloaded the patch and reloaded that same savegame, it worked fine. But when I loaded the patch a second time and opened that same savegame, it started crashing. A lot. It doesn't crash at all on the other two.

Could this be a failsafe, a way to keep people from bouncing in and out of the patch in order to exploit old glitches? I doubt it. Most likely, all of this patching and unpatching is corrupting my savegame file.