I've been surfing the forums on WP 8.1 for a while now, and it's been nothing but smooth. Today, however, I found that the common room section vanishes sometime in the evening - I made no changes of any sort to my phone or my browser, which is Internet Explorer for WP.

By vanished, I mean the Common Room hyperlink still appears, and if I click on it, I'm directed to it. Here's a photo -

Screenshot

 

See that tiny little arrow on the end of the title bar for each forum? One that points up on all the forums you can see.... and points down on the one you can't?

Click it.

 

I'll just go drop into the nearest well now. Thanks.