<area shape="poly" id="node1" href="TEH" title="a" alt="" coords="77,29 76,22 70,15 62,10 52,7 41,5 30,7 20,10 12,15 7,22 5,29 7,37 12,43 20,49 30,52 41,53 52,52 62,49 70,43 76,37">
The href attribute looks wrong. It seems it should just pass the attribute through unchanged and thus be
<area shape="poly" id="node1" href="E" title="a" alt="" coords="77,29 76,22 70,15 62,10 52,7 41,5 30,7 20,10 12,15 7,22 5,29 7,37 12,43 20,49 30,52 41,53 52,52 62,49 70,43 76,37">
digraph G {
a [URL="E"]
}
Owner: *