I will do some reading on facebook dev site and see what else they are adding. I would assume here that if you can not replicate the issue on a real computer but only mobile there is something that the facebook integration puts in the
vb header on a mobile that is the culprit.
However I just checked your site figuring brand new day lets try it out and low and behold no issue at all so did you find out that it was a hack instead you had installed? That was uploaded via my mobile phone a few minutes ago.
testing - Semo Classifieds