So...

The "fire + lever room": hit the trigger, cross the bridge, kill trojan + zombies + 2 silkwings. Pick up the koala, run over the spikes: a handful of zombies spawn to the north. And exactly at that moment, every time I play, SK turns into a slideshow. Like 0.5 fps. Many other players seem to have it, too. Some seem to be effected even if they're in the next room while the spawn is triggered by someone else. Some need to restart their client to fix it, for some it seems to be enough to get rid of those mobs and wait. At least for me, it's very easy to reproduce: happens every time to me, sometimes to others.

I've already sent a bug report about this months ago... just though i'd write it down again somewhere where there's more space than for 2 sentences ;). Also I'm curious: HOW can that happen? What's so special about that handful of zombies? And is someone even trying to figure that out / fix this? It's been there since I started playing the game...

(The only other place in the whole game where I get this bug seems to be the second of the twins levels, as soon as the very first spawn is triggered. But there, no other player I've been there with so far had the same problem)