My problem is the "W" key, or rather the sidestep functions. I'm not sure. I managed to get Q and W mapped to Left (Q) and Right (W), which works as sidestepping when moving. A compromise, but it does work. However I would have liked to be able to bind Q and W to the actual sidestep functions.
Like Wanderer09 said, accept the changes and then go back and do it again. Works fine for me that way.
In the beta we were able to bind the 0-bar (the bar you showed by pressing the alt key) to different keys then the default bar (bar 1). Why isn't that possible anymore? I had all my directional keys "hidden" there and thus freeing up 3 slots on the main bar.