Yup, started playing it again with the pre-release 1.8 file. Sleep patterns are officially fucked again. Damn this game.
EDIT: Ok, reverted back to 1.7 because of the crashes. Already missing the new lighting. Hadn't realised how much it had changed. Waiting on the official 1.8 release now.
EDIT EDIT: Anyone else finding a significant lack of coal in 1.8? Been using logs and charcoal since I started testing...