Notifications white screen on cron

Hello,

I've already posted an issue on the Messaging module, but I'm not sure if the problem lies with that module or this one, so forgive me for duplicating the post (http://drupal.org/node/615704)

I'm using Drupal 5.16 with Mime Mail and have just installed Messaging Framework and the Notifications Module. I know that the mime mail part works fine as I already have the Simplenews module working.

I wanted the Notifcations module to alert a Moderator when a new Forum topic or comment is posted, but since installing it I have found that if I have a message in the queue and I run Cron it gives the 'white screen of death'. I also get the same if I try and use the 'Run queue process' option. I'm getting a simple white screen and no errors, despite turning on error reporting and upping the PHP memory to a whopping 48m.

I saw a similar issue in version 6 (http://drupal.org/node/382576) but the line that gets amended doesnt seem to be the same in the 5.13 module, so I dont even know how to try that fix - or even if its the same issue.

Versions: Drupal 5.16, Mime Mail 5.x-1.0, Messaging 5.x-1.3, Notifications 5.x-1.3

Any help appreciated.