I mentioned this over on The Bane forums, but in case someone stumbles across here first, the Hunter shooting macro has been revamped for 2.3.2.
I updated my macro to:
#showtooltip Steady Shot
/cast !Auto Shot
/cast [target=pettarget, exists] Kill Command
/cast Steady Shot
/script UIErrorsFrame:Clear()
A little bit shorter than the previous, but works perfectly with the Auto Shot changes that came out in 2.3.2, namely, /cast Auto Shot alone toggled it on and off and ends up clipping your shots. Adding the ! in front tells WoW not to toggle it on and off.
Enjoy!