I did the same thing, but did this for the change:
Code:
return '<a href="' . $link . '" target="_blank"><img src="' . $link . '" border="0" width="100" height="100" alt="User Image" /></a>';
However, it still effects the sig images. It works perfectly, with only that one modification, but I want it to not alter sig images.
This one change will work for any browser, no other changes needed.