OK,
To demonstrate my issue;
The Main page has a number of links; Home, forum, shop, etc. When you click on the "forum" link it opens a new window. The others don't.
Now go into you messages and create a new message. "Oh and I want to quote another post I saw last week - I'll just do a quick search, but I don't want to loose what I have already typed".
So I open the another copy of the main page and click on the forum link - Bang Iv'e just lost my message because the main page resets the forum link.
If the main page didn't open a separate window this wouldn't occur. As far as I can tell there really isn't any need for the current functionality??
A.