Came across an unusual problem on a site where we are using the forums, a spammy post was deleted for obvious reasons but it still showed up in a panel on the home page where we were using the ‘exp:forum:topic_titles’ tag. On investigating the cause I found that a topic still existed in the database for this entry, so despite the Admin deleting the offending post the topic still existed and as such the spammy title still appeared in the panel using the ‘exp:forum:topic_titles’ tag.
Perhaps the post deletion routine needs to be updated to also delete the topic if there are no longer any associated posts?