Is that only me? There are certain threads that I can't post in. I get a White Page of Death all the time - and if I refresh, I go back to the previous post that I successfully made. The threads I've had this trouble with include the Triathlon thread, the Eyes on YOU thread and The Man's nitpicky thread
It usually just happens spontaneously and I can't get around it for at least 24 hours - the Eyes on YOU one I couldn't for at least three days.
EDIT: WPoD = the 'Detect Network Settings' kind. If I click on that, I go back to the previous post that I successfully made, just like refreshing.