I have upgraded to 3.4.05 recently and all is working well for me (admin) and others, but I have one member who is a moderator who is having difficulties after he makes a post/reply. He says the forum gets stuck at a blank page with just the header at the top... This link below is exactly what he sees:
You need to add the domain the forums are running off to the list of trusted domains in your Norton Internet Security.
Search is your friend “I was having a mildly paranoid day, mostly due to the fact that the mad priest lady from over the river had taken to nailing weasels to my front door again.”