Not really a bug, but I just wanted to let you know.
I am setting up a test shop, that currently has a single product, I am getting the "Google Product Sitemap" generation to fail.
This is related to line #421 in the script sitemap.class.php
In the function GenerateProductSitemap(){
It should read
"if ( sizeof($container) >= 1 ) {"
instead of
"if ( sizeof($container) > 1 ) {"
/JS