Our guild stepped into Black Temple today, and downed the first three bosses without too much trouble. We went on to Teron Gorefiend, which seems like a really fun fight. Our best try was 11%.

We did notice one strange thing, though: Bloodlust didn't seem to be applying properly. Some people were receiving the full duration, others got only a couple of seconds. Does one of his abilities strip buffs off people? It's really quite unlikely that anyone could be outranging it (we did him in the orthodox way, with everyone grouped up on his little platform). Nor were shamans being moved between groups. I've read around some various strategies and there's no mention of him purging anything. We're rather confused, and any help would be greatly appreciated!

Don't stand by the wall.

Can you elaborate? Which wall?

The wall. Any effect that causes your character to grow will be canceled if your character's growth causes collision with a wall or overhang. The point is to ensure that people don't get stuck as a result of such effects.