I have read all the pages and it looks that only one have the strange problem:
Most of the pages are in the sitemap products (categories also) with priority value in range 1.0 - 0.1 but some of them are with strange priority values "0,1" while other with normal "0.1" (comma instead of point"

This makes Google to produce warnings in webmaster tools

feel free to look:
http://gps-centar.com/sitemapcategories.xml
or:
http://gps-centar.com/sitemapproducts.xml

any ideas?
version is:
v 2.1.0 30.04.2009 10:35

With best regards

Danijel