I've recently upgraded Apache and PHP on my VPS, and one of the unpleasant surprises was that some scripts which tried including pages from remote sites (I know, not the most secure approach, but there were reasons for that) got broken.
allow_url_fopen
Traditionally, all the websites Google finds suggest that you double-check that your php.ini config has the allow_url_fopen enabled:
allow_url_fopen = On
[Read more…] about URL file-access is disabled in the server configuration