Ken,
I am having exactly the same problem. It started since the new forum went up. I am
assuming it to be a browser setting, but don't know. I am using Opera. I must try Firefox as that is quite good too.
The reason I haven't researched the nuisance is that I currently have so many other problems at the moment that this one is on the back burner. For example of what happens to me, if I type this post for much longer, I will find myself logged out. Then, I have to copy and paste the whole post into a fresh "signed on" page. Grrr.
Patience (what's that?) will eventually show me the solution.
Any bright spark out there got an obvious answer. Sorry I couldn't help Ken.