I've always had joystick button 34 on my Bravo Throttle Quadrant assigned to "Set Parking Brake." This allowed me to use the leftmost rocker switch to set/release the brake.
It seems like my problem started after SU11. Now, the switch does nothing. I can see on-screen that the parking brake is set. If I try to release it with the mouse, it clicks and moves a bit, but remains set. This happens regardless of the position of the rocker switch.
Any ideas on this?