The problem is that the shear shortcut that was originally chosen was
eaten up by the shortcut to switch to the scale blezmo. Changed the
shortcut to CTRL + ALT + SHIFT + S which is painful but seeing as how
shear in object mode has limited use, I don't think it will cause any
real problems. I also updated the menu entry to match.
This was assigned to Martin but he's busy so I did it... and if I did it
wrong... blame him for not fixing it sooner ;)