Ok I see it on your site on search results, but it does not happen on this site and we use the exact same thing so it must be something about your site that is different. There is a script error happening on your site with the neathtml script but I suspect it is caused by some other script doing something that interferes.
For one thing if I search on "mojo" as you requested the url of the searchresults seems to get something extra that should not be there:
I have no idea how that gets there, it should not have the # or any of that extra junk, some other script seems to be doing that.
So I think there are other scripts on your site doing something that causes the problem.
I would start disabling things such as addthis and any other scripts one by one to see if they have any factor in the problem. AddThis seems to be adding a lot of stuff to the page including a lot of base64 images
I might also look at the modified time of the neathtml script on your server to make sure nothing has modified it recently. I would try different skins, non-artisteer skins, or more simple skins and see if the problem goes away.
Did you add any new script recently?
Are all these sites where the problem happens in the same installation?
Can you produce the same problem on our demo site at all?
Hope that helps,