It has happened with me and a few others recently. Are you using Chrome as your browser?
Could you link me to the pages you have seen it on? I have only seen it on one page.
We have checked it out and it looks like a browser issue, but I wouldn't follow the link as you said. As said post the links and we will take a look at them.
I have broken your link as a precaution, so others are not tempted to follow it.