When changing the current image by mouse wheel (preferences option "cycle through pictures with mouse wheel" activated) the "load" event doesn't detect the change. With the next/previous buttons it works as expected. Please make it also working with the mouse wheel.
It must work or the Viewer Select - Make file display track standalone viewer script would not work.
You're right, sorry. It was my own fault. I overlooked that I used an If-clause that made it only working if the viewer was in the foreground. It's working fine now.