In the recent patch, there was a small change to macros. I think it introduced an unexpected bug. I'm a warrior. I have an ability called Charge. Here's my Charge macro:

#showtooltip
/cast [spec:2,nostance:1] Battle Stance
/targetenemy [noharm][dead]
/cast [spec:2,stance:1][] Charge

That macro stopped working upon entering ToC5 (heroic). The icon changed from the normal Charge icon, to be the glowing yellow horse shoe icon of the jousting mount Charge ability.