Bought a 2011 MBP 15 for cheap because the right Shift and Return keys didn't work. I plan to replace the keyboard eventually (happy to use apple bluetooth for now) until just now I accidentally went for the '?' (right shift+/) and it performed the function of F6 (keyboard backlight brighten). 'left shift+/' makes a '?' as it should. What's up? edit: I should note that I wiped the HDD and CCC'd my 13" drive onto the disk. shift/return keys didn't work before or after on the 15"