My friends and I have been using a server for a while now, and we've found that if we change the bindings on there, they stay until we relog, at which point, it resets, not necessarily to default, but to whatever they were before the change, i.e. changing them on single player works, but then changing them again on the server will last until you relog, and then they will revert to what you set it to in singleplayer. I'm guessing its because the keybinds are in the config file itself, and on the server it tries to save it to the wrong one, i.e. the server one, but that doesn't explain why it still works up until you relog... Definitely been a consistent issue though. We're having powers cut out oddly, but have yet to determine enough a pattern for a bug report yet.