You're currently sending Geo Tags as:
<geo xmlns:georss="http://www.georss.org/georss">
<georss:Point>37.78029 -122.39697</georss:Point>
</geo>
But according to the schema for GeoRSS-Simple Point should be
lowercased:
http://www.georss.org/simple
as in:
<geo xmlns:georss="http://www.georss.org/georss">
<georss:point>37.78029 -122.39697</georss:point>
</geo>
The original example you posted to the form had the correct case but
what you actually rolled out is different. Was there a reason for the
switch?
I've updated my code to look for uppercase Point for now...
-steve