Or you could use a hex editor.
Yep, that was it lol, thanks.
The only way I can open them, short of just breaking them, is with pressure plates. I can't open wooden doors but hitting them, iron doors with...
Its a small server with a few friends, so everyone has access to everything.
I was using v1.1.3, upgraded to v1.1.4, and suddenly everyone was immune to all damage. Tried v1.1.5, and it gives an error about invalid string...
Separate names with a comma.