My RX-8 just started blowing my ignition fuse 15A everytime I put it in reverse. I have a manual transmission. Has anyone else experienced this trouble?

Hmmmmmmmmmmm................no...........do you have a lighted shift knob?
Have you ever been under that panel around the shifter? There are wires running to the seat warmer buttons, maybe when you put it in reverse those are getting crimped and shorting?????????