Some rectangular areas are invalid HTML

[mattflaschen]

Some of the area elements (copied from the source under "Start copy/paste imagemap code") are invalid. It seems all of the invalid ones are rectangles (rect) that don't comply with the rule:

"second of which must be less than the fourth"

The second is "the distance from the top edge to the top side", and the fourth is "the distance from the top edge to the bottom side" so the rule makes sense.