been using v3.14a, and all priors, since released and have had no problems at all except shutdown error we all know about.
i'm connected totally wireless via linksys router (with 3rd party firmware and ports forwarded) to my notebook.
i use only the router firewall since software fw's can be bitchy to work with. don't like 'em
and since i use a port monitor sniffer to show me what comes/goes i can sleep better now.
i wish i can help out with everyones probs but it seems like there's too many factors at play to sort out.
at least there's some good people tryin to help out
btw i use a long port range ex 52881-52901 and when i open a torrent to download i let it be even if i get a 'connecting to tracker' 'cause it will connect anyway if the tracker is up or getting pounded and then the error goes away once i'm connected. usually it been about 5-10 minutes max after getting that error. get a router!