Hmph, I see that upstream has wrongly (and summarily) closed this bug report. :(
The bug is not about the *presence* of the User-Agent header, which is indeed optional. (The 'Add "User-Agent" header' checkbox is found in the "More Headers" tab when posting an article.) This bug is about the mailto: string being malformed when the User-Agent header (or Mime-Version, or Content-Type) is split over several lines. As I pointed out in my second message, PostUI::maybe_mail_message() is to blame. It starts by converting the list of headers into a blob of text, and then proceeds to prune *lines* corresponding to certain headers, matching ":" as a delimiter on every line (and skipping the next character, assumed to be a space). This means that this: User-Agent: Pan/0.137 (The Mattel and Mars Bar Quick Energy Chocobot Hour; GIT 9a6aef1 git://git.gnome.org/pan2) results in this junk being included in the final headers: GIT 9a6aef1 git: /git.gnome.org/pan2) which is rightfully rejected by mutt. -- Packages should build-depend on what they should build-depend. -- Santiago Vila on debian-devel -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org