Also it works if you reference directly an image under the 14 hive folder,\
Add to the Image URL property this and it should do it.
/_layouts/images/saveitem.gif
RE: qListForm Custom Action Not Displaying on Toolbar
Also it works if you reference directly an image under the 14 hive folder,\
Add to the Image URL property this and it should do it.
/_layouts/images/saveitem.gif