I noticed it too for a couple of hours now.
The problem was with the "addthis" share tool. They released a new version yesterday morning (27th Oct '09) that broke the back button support in a few browsers. Apparently it should be fixed now though.
Try the refresh button.
Just right click on your mouse and hit back
It’s happening to me too. You’re not the only one :-)
Seriously what lame browser are you using.<br />
been here for 4 months and have never had a problem.<br />
for the record i use OPERA. no, i dont have any affiliations with the company.Just speaking from first hand experience. And when it comes to slow! well i could write a book . for Christ sake.