Nominally you see a rectangle with lines in it to the left of the page h1
In my environment, in fact what I see displayed in this location is a "?" inside a diamond shape using Safari 5.1.9 although it looks correct with Firefox running on the same mac.
Another poster asked this question and got instructions how to hide it, but I'd like to be able to specify what gets displayed, i.e. a custom png
Anyone have any hints?