I found an older bug in apt (#465572) that might be related. One of the workarounds suggested was to set Acquire::http::Pipeline-Depth to a large value (like 10000) in apt.conf, or on the apt-get command line with -O. Can you see if that makes the error go away?
-- Eric Cooper e c c @ c m u . e d u -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org