Hi guys,
Make sure you are using the latest version of internet explorer or Mozilla Firefox (chrome, that 'other' browser is not tested).
You should then fine things are ok. I know that when I access the site from my works computers which use the old version of internet explorer I get a similar problem. In which case I then need to clear all cookies/cache and restart the browser...and it works again.
However at home on firefox (across three different pc's) and on my mobile...no troubles

Hope this helps.
-Van