If the screen goes blank, try just hitting refresh.
No crying, just information in case it helps-
I just went to edit a post. No big deal, they'll figure it out.
I posted a post, clicked "edit",
My post (already posted), went blank. A the standard "reply" field was also blank.
Refreshing with the browser button, refreshing with CTRL+R, and refreshing with F5, those take me to the same place I was on the same thread, before I had hit the "edit" button. Repeating those actions multiple times gets the same results. I think there's a definition for that.
No idea if it matters at all, but