In google account i see some warnings about sitemap. In annoucents it wrote no rewriting and in some categories i.e. here http://www.domainer.sk/ponuka-sluzieb-f31.xml.gz it is same priority 1 , in others it is ok. Where can be problem?

Well, priority and changefrequ tags are not the same unless if you only have a single URL like in your announce sitemap.

Maybe we should only output it when there is at least one global announcement in the forum, but it's not very smart from Google to warn that all URLs have the same priority when there is only one in the sitemap.

I assume they will fix that.

ok. Because if i look in bigger forum i see there are little bit mess in priority but no warn from there. Maybe i add other topic there and make global annoucement too