Hi Matt, Thanks for replying. No recent updates. I have wordpress 3.8 and I did update plugins until about a week ago but stopped because my sidebar widgets bar homepage suddenly disappeared and I wondered if I was causing conflict by updating before the next commons update. I have 9 updates pending in the admin bar but only 6 showing up in the list. I assume the other 3 are integrated into cbox. I have been out all day but the site was working this morning (UK time – think we are roughly 5 hours ahead of you). Last registered member was today January 17, 2014 1:28 pm (very roughly 6 hours ago), so I assume all was fine then. My site link is studentsurveyor.com
I have tried changing permalinks and deactivating and reactivating recently updated plugins – but no joy.