ahh o.k. you are laptop user, that is a different thing.
i don't like laptops so all my computers are wired
but it should be my choice to set it by hand or take the os-system-settings.
i belief it is a prob with the revision in 0.8.13 that the proxy-settings for https are not useful.
server logs don't lie
, calibre call the wrong ports if proxy-entries for https exist.
possible that it only affects certain system-combinations. in that case all my systems are affected.
should it be random?
edit: what os in your case