We covered a couple of known bugs in 3.0.8 yesterday, namely some animation errors (which we're anxiously awaiting being able to log into the game and grab some video of), and some problems with casting of the Warlock spell Ritual of Summoning.
And now Hunters have a bug:
Some Hunter aspects "behave" as if they have a global cooldown.
This should not be, and will be fixed soon (we assume). Patch 3.0.8 was going to remove them, but alas we'll have to wait to have this function properly.
As far as what aspects are bugged, and under what conditions, we don't know yet. Keep an eye out later when the realms are up for more information.