Steve,
 
I've noticed, for some time, that threads that I participate in, sometimes doesn't mark up as a subscribed thread. I have until now thought that I've missed to check the apropriate box, but just now I found out that the thread: Sammie firmware, from wich I've received notifications in the past, suddenly wasn't marked as such a thread. (Follow that sentence if you can. )  
 
Just thought I'd mention it.
 
gorth 8) 8) 8)