The worst time I have had was a couple of days ago. I do not remember which forum I was trying to read but kept getting blank pages. My technique is to use the back button but this time it did not help. What I eventually did was to click on another forum. It opened normally and then I went back to the one I wanted to read and it, also, opened normally. I suspect, in my case, that the forum I wanted to read was being accessed by too many people at the same time.
Beverly A.