The Chamber tool has been added, to send temperature settings to a heated bed or chamber. The 'Temperature of Bed' preference sets the temperature of the bed by sending an M140 command, the default is 60.0. The 'Temperature of Chamber' preference sets the temperature of the chamber by sending an M141 command, the default is 30.0.
Kulitorum has made a heated bed. It is a 5mm Alu sheet with a pattern laid out in kapton tape. The wire is a 0.6mm2 Konstantin wire and it's held in place by small pieces of kapton tape. The description and picture is at:
In my opinion, it is a brilliant design. The best thing about it is that the components it uses, kapton tape and heater wire, are already on the reprap parts list, so reprappers might already have them and if they don't they'll able to order some easily. I don't know if the tape and heater wire can be added to existing acrylic or MDF beds, but hopefully someone will try it out.
The 'Infill Perimeter Overlap' setting in inset has been moved to fill. The 'Extrusion Width over Thickness' setting in inset has been moved to fill and renamed 'Infill Width over Thickness'. So you'll have to reenter those settings in fill when switching to this version, if you have changed them from the defaults.