I managed to resolve this query with the help of some members of the forum for my webhost. Apparently, there is an issue with /wp-includes/cron.php.

For any other Wordpress 2.5 users who are having problems getting future posts and other cron functions like trackbacks and pings working do the following.

in /includes/cron.php search for

Code:

if ( $argyle )
      fputs( $argyle,
           "GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
         . "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"
      );
}

and replace with

Code:

if ( $argyle ){
      fputs( $argyle,
           "GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
         . "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"   );
      fflush($argyle);
      fgets($argyle);
      fclose($argyle);
   }
}

I've posted this here for those people who do not have any account at NearlyFreeSpeech.net. I've edited this code, and it does seem to work much better now.

Firstly, I'd like to say that on at least one occasion, this plugin has saved my bacon. I wouldn't be without it! :)

However, I've recently moved to a new hosting provider, and the plugin has stopped working automatically. What might be relevant is that the host doesn't have cron enabled. I seem to recall seeing, though, that the plugin uses Wordpress' own cron?

When using the plugin manually, it works fine - it backs up to the server, emails, downloads to the computer, etc. And everything is included in the backup - all the relevant tables. Sending the email and attachment to Gmail works fine (the attachment is only about 100kb).

It's only when the plugin is due to run manually that nothing happens. I've had a look at the Backup page, and it seems that the schedule isn't updating. For example, I set the plugin to run every hour, at 9AM, and press submit. At 10AM, it should do it's thing, but when I go back later, it's still saying

Next Backup: May 8, 2008 @ 10:00 am

Is there something I need to do or change to get this to work?