Weird Page Behavior

Alll of a sudden I seem to be getting page errors, 404’s, that say the following:

The requested URL http://www.progressiveink.com/bin/fcgi-php/index.php/social-bookmarks/ was not found on this server.

It only happens with a few pages, while others seem to be fine. Why would WP be writing the URL in this fasion all of a sudden? I have no ” /bin/fcgi-php/ ” and I never added this part of the path to my links.