Iphone safari freezing on 4chan

For some reason today on any board i can scroll half way down and then it stops loading.  Once this happend it freezes and i have to quit and re-open safari only to have it happen again. I have a 3gs and i have os 5.1.1 installed. Can somebody tell me whats wrong and tell me how to fix it please?

Same thing happening to me, and I use the Atomic Lite browser. When I back out of a thread, the address bar starts flickering with some address ending in .css then the whole browser locks up.