In case this could help… and more if this could prevent some nervous breakdown to dumb guys like me...
If you have a static php page for classical static stuff (like about.php for example) and you want to take benefit of the new 1 .3 page feature.. be aware to delete from the serveur your php page, because if you don’t a page with the same name will not work.
It seems obvious but it took me several night to understand this.
I had an about.php file and I wanted to use a 1.3 page so I wrote the content in a page.. and impossible to make it work.
The .htaccess file was ok .. if I did index.php?pagename=about it worked but doing /about it didn't ..
I checked everything once, twice, three tiumes.. more times.. until I realized that the about.php file was screwing up the stuff.
So avoid to have a 1.3 page with the same name that a php file in your directory
Luc