there is a small issue with Topics:
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Now fixed in 1.8.4
One more issue with Topics (I dont know, if this happens with other modules also)
I could not reproduce this at first, but suddenly I had the same problem with a bakery shop.
It happened when a page first gets a WYSIWYG (or other mod) and then a Bakery/topics/news section.
If the page is seen as "processed" the second section_id was was not added to the $public array.
Also fixed in version 1.8.4.
mhh is there a fix, because sitemap didn`t work....
Fixing something where the problem is not known is pretty difficult.
What do you see when you open the google_sitemap.php manually in your browser?
If there is an error you might need to view the source of the page to read the full error.