I fixed it by removing the URL. I think the issue is happening for a few sites - Channel 7 was the culprit in this instance, but we have also met issues with foxsports. I believe the bug lies in the expansion of the URL to take into account the title of the link so that it can display the friendly title instead of the unfriendly URL, but on complex sites it is mistakenly capturing other details such as images.

Is anyone aware of how this actually works? Is this a vBulletin plugin we are using?