I will post this here seeing I am now using v7.180 even though it occurred under v7.104
I have been using POP3 and prefetch on 4 e-mail accounts, 3 for me and one for my wife, mostly successfully since prefetch was introduced.
Recently while on holidays I accessed one of my pop3 accounts via webmail, now I find that I have permanent count of 57 e-mails sitting in the unaffected queue.
I think that last time I had a number of e-mails stuck in the unaffected queue I turned the ASG for a while and when restarted the queue had reset to 0.
To me this would seem to be a bug.
Ian M