jQuery attribute auto added to elements

Question

After using the IE8 built in Developers Tools for the first time, I noticed jQuery is attaching an attribute to some of my elements: alt text http://thebe.jtan.com/~vince/st

Answer 1

I doubt it's hidden in firebug, as I've seen jquery data object within that as well.

I believe that jQuery or whatever plugin you're using just adds that in IE as a fix/workaround for various browser specific bugs/shortcomings.