I don't use the thread email notification, but I do opt for PM notifications, in case I'm offline for a couple of days and someone is trying to get a hold of me. They always come through.
I'll point Tran in this direction and see if we can't find out if there's something to do...or if there isn't. Sometimes we're at the mercy of vbulletin...
"Keep the faith."
- - Read Twice Before You Post.