I have and even got someone to pm me - even i dont get them!
What's more, i do get the email alerts when either a post requires moderation/approval or a new member joins.... crazy

I'm not on perfect speaking terms with my host as i'm in the midst of moving all of my sites across to a new host - my UBB's are the last to go.
I guess i could hold out until they're settled on the new host, but (a) thats not taking place until Easter (as its a weekend job) and (b) its irritating the hell out of my users...hey ho