deeper - 4:24 pm on Nov 2, 2012 (gmt 0)

@ditaP:
WP only allows .html for posts not for pages, check it.

@smithaa02:
Thanks for the code, which should be placed in the htaccess, but what does it?

Where to fill in all the page-Urls like www.website.de/apples.html
www.website.de/bananas.html
...
so that WP replaces his Urls with the former html-Urls?