> (typically 100-150) are not converted to an .html
> extension but stay at .php, with the result that
> these can not be accessed by the browser.

Previous versions always renamed text/html files to .html or .htm
The 3.43-x version does not. It always keeps the original extention (php, asp,
etc.)

This does not mean it can not be used in the browser. They work just fine.

It just means you can not click on the file in explorer and have it open
automatically. Just add the file type associations (control panel -> folder
options -> File Types)