A small bug has been fixed.

There was a small bug in the file "single.php".

The code to get the Next and Previous was wrongly written.

The code should have been:
XML_next_posts_link(...
XML_previous_posts_link(...

All of you who are using the old version 0.1.1 should either download version 0.1.2 or make this change in your php file.

Thanks again for everyone for posting your feedback.