Today I loaded a save to look at something in game. It worked fine, no problems. So I exited the game. Maybe half an hour later I tried to load the same save again and the game crashed trying to load it. Afterword I tried again to load the same save and it seems to be working fine, no problems.

I haven't changed my load order at all between those three times.

Was that crash just a fluke?

Might be. Just in case, you could retrieve a previous version of this save (if you have Windows 7), or a previous save, and keep it somewhere safe, so that you can get back to it in the future in case something goes wrong.