There's a few possibilities - one being problems on your side (have you tried clearing your cache and/or resetting your browser?) - but it's possible that you are trying to access those parts of the site at peak times when the server is taking too much load.
If thats the case, during such times a few people would be denied access until room cleared up, then they'd take the space. That would explain why only you see it, and why other people are still posting even when you can't access the site.
I could be totally wrong though and the problem may be something totally different, so don't take the above on faith, it's only a possible reason that came to mind having experienced similar problems in the past with other sites.