Just switched to 4.1.1 in hopes of more stability, and I got a bunch of errors

that weren't given before: apparently I'm not supposed to add nodes

in a background thread.

I suspected the crashes are from the threading...

I removed the related thing (saves are still in the background, smooooth),

and I'm testing for stability now.

Looks promising, I think it's been well over 5 minutes (crashes were really

frequent).