I am having this problem in my magento site. Sometimes in layered navigation when I hit a link of a category or filter I get the right link but in the end I get this:
I have this only is some links and not all the time. Sometimes it just disappears. I check and found that it has something to do with google. I have enabled auto tagging in my adwords account. Also if you hit the link without this at the end it still works fine. Can anyone help me? What is this thing and why I see it?