For whatever reason, the Creation Kit has decided to start auto-loading Skyrim.esm, then crashes, immediately after Initializing Facegen finishes. This is after reformatting my hard drive (for an unrelated reason) and then reinstalling the CK. I've tried restoring the SkyrimEditor.ini and SkyrimEditorPrefs.ini I had before reinstalling the CK, and I've also tried the default SkyrimEditor.ini and letting it regenerate SkyrimEditorPrefs.ini.

Skyrim itself runs fine. Any ideas?

Wait what? Like when you boot up the CK it just decides to load Skyrim.esm instantly without any warning or anything?

Make sure you don't have anything in the launch options in Steam... Not sure what else to say without more clarification.