not sortable with images inside

hi guys... in some fields i have an image for my status.

the problem is that i can't sort a column when there are only images inside.. is it possible to realize that?

here is the demo: http://jsfiddle.net/A5Kr2/ (try to sort "Status")

edit: the jsfiddle runs with 1.9.0. it doesn't work with the latest version on my host