I notice that when you are in the forums, just below the menu bar (News Reviews How-to Forums), on certain forum index pages there are links to all the other forums, whereas on others, just your current location (e.g You are here>Homepage>Forums>Helproom)
The forums with ALL the links are Business, Speakers Corner, Mobile World and Windows8.
I find that having all the links available is more convenient.
I usually access the site form an iPad, this may be significant I don't know. I am currently on my iMac but I have just clicked on the Last Response for this thread on my iPad and got only the initial post as I have previously described.