See #848611 which I have filed against dpkg. You'll see I have suggested a workaround which I hope to implement RSN (perhaps tonight).
Thanks, Ian. -- Ian Jackson <ijack...@chiark.greenend.org.uk> These opinions are my own. If I emailed you from an address @fyvzl.net or @evade.org.uk, that is a private address which bypasses my fierce spamfilter.