I've changed the board software from Kareha to Electron Board, which is an updated version of something I wrote two years ago. Back then I didn't know what I was doing, and now I still don't know what I'm doing... but I've cleaned it up a bit and got some of the bugs out in the past couple of weeks, so I want to give it another shot. It's not quite ready for a public release (the HTML in particular really needs sorting out) but hopefully it won't break this time.