I see your .jpg.html point, but in this case, it was my fault. BTW: is that search engine friendly, or not? I actually don't know if I care two appends.
It's actually STILL not working. I can't use your Google sitemap plugin, which was goal.
I'm physically changing "permalinks" to have .html as I write them. It almost seems to be randomly appending, but for sure, "pages" are not. A manual append is making an RSS version of sitemap PARTLY work.
Like I said, not an engineer. But I DO GET PROGRAMMING LOGIC (I'm the art director you don't hate, and feeling is reciprical): it's starting to fail logic.
Please see updated http://snarko.com/phpinfo.php and cancel it's mod_rewrite?
You're probably right IT'S THE SERVER somehow; I'm not sure.