My b2evolution Version: 2.x
The system tool in b2evolution says that PHP allow_url_fopen is ON. I've asked my hosting co. to turn it OFF but they say it IS off.
How can I really tell?
PHP allow_url_fopen
On
When enabled, this feature is known to facilitate hacking exploits in any PHP application.
b2evolution includes additional measures in order not to be affected by this. However, for maximum security, we still recommend disabling this PHP feature.
If possible, change this setting to allow_url_fopen = Off in your php.ini or ask your hosting provider about it.
Go to your phpinfo.php file, which used to be in your install folder so if you deleted your install folder you will have to upload that file to somewhere, then search for "allow_url_fopen" and you'll see what's up and down with that particular detail.
Mine is "on" and b2evo says it is "on" so I can't help you in terms of duplicating or not your issue.