Guys.
There appears to be another bug that has crept in in V 1.3.19.
When people delete their account, it appears posts are now no longer being removed from the timeline.
I have had a couple of users delete their account but their "updated profile picture" remains on the site, with the status "updated their profile picture" - their username has gone, the avatar is set to the bog standard "grey man with tie" icon, but their picture is still accessible on the timeline. It also appears I cannot delete these items in the back-end stream settings as they don't appear. The only way I can delete these items now is to log in to the front-end as an admin, and delete it from the stream there.
Whether this has any link with the fact that some profile URLs are now to respecting their permalink names, I don't know. All I do know is that I think a few bugs have crept in into release V1.3.19.
Dave