Couldn't quite find an appropriate place for this, so hopefully here will work...
A tech problem if you will - I have 'Daily Email Digest' as a notification set up for a number of threads, and it was working fine but has stopped in the last week or so. I think what happened was that the e-mail account I had listed in my profile was full, and so the notification e-mails would have bounced back, but I pared the account down a bit, and still no luck with receiving any notifications - then I switched the e-mail in my profile to another one that has loads of space free (2 Megz+) but no notifications have been showing up there either...