problem: i bind 'stop casting' to middle mouse button. when hovering my mouse over a unitframe while casting and pressing the middle mouse, it does not stop the cast.
i also tried making a macro with /stopcasting, putting the macro on a actionbutton that i bind to middle mouse via bartender and the same thing happens. it only cancels casts when my mouse is not over a unit frame.
thanks for the answer, but i tried it with all addons off and it did not work. also, if you bind a key in the wow keybindings, it unbinds what was assigned to that key before.