Since I'm no expert on this subject, and I'm just using the mod, like you, I can't give you any professional advice, but I'd try to enable (or disable) "RegEx Right Slash" under the .htaccess settings (you have to enable more options for it)

can you post the contents of your current .htaccess?

That sounds like you forget to update your .htaccess file manually (note that "Changing this option requires and .htaccess update.")

There are database changes, yes, but phpbb_seo/phpbb_seo_install.php and gym_sitemaps/gym_install.php are designed precisely to take care of the database changes, so running them (while logged in as admin) should just do fine.

I'm not sure I understand what do you want now.

I WAIT WTF, I don't have to help you. I mean I'm glad to help, but I have other stuff to do besides helping you, so be a little patient, OK? If you would be so kind to read the phpBB SEO Ultimate SEO URL Presentation you might be able to solve the problem yourself. 1.This, .htacces mysite.com/.htac...

you have to copy the .htaccess to the right place.

It does not work!

It throws "the page is not properly redirected" error in firefox.

also the part "RewriteRule ^index\.php$ / [QSA,L,NC,R=301]" ends up in an endless loop.

Can someone help me with it again?

No the SQL rewriting was nothing related, if you don't know what it is, you can just disable it of course. I just thought you had some problems with the cached urls being old, but that was nothing related. Ah ok... now I understand. So it does not matter that the sitemap does not show the rewritten ...

Sorry now I really checked your sitemap, but I don't see any problem with it! First I checked the sitemapindex.xml, there are quite a few forum sitemaps it is linking to, like: forums/forum-sitemap.xml forums/greece-f172.xml forums/china-f138.xml forums/united-arab-emirates-f288.xml forums/immigrati...

This topic you just bumped is over two years old. A lot of changed since then. For example there are no separate SEO url mods, just one called Ultimate SEO url, in which you can chose your preferred rewrite mode (in the ACP). There is no need for code change between rewrite modes (you just need to s...

if I'm not mistaken you might try to run
/phpbb_seo/sync_url.php
And delete the cache after that.

Since the XML Sitemap Protocol is described by an XML Schema, I doubt you will need a DTD for it.

In other words: this is not a mistake in the sitemap it's just the validator.

I'm sill waiting for some approvation as I don't want it to mess up something.

It works for me, so I can't confirm.