Undefined Message

I recently  have had this message along the side of my website page,  can anyone tell me why this may be happening and how to fix it.

this is the third site i've seen this on this week.  If you like PM the url or post it in here...     that is not dolphin code by defualt.

Thank You I seemed to have found the problem was of my own doing while editing footer.html  Removed my changes the message gone away