It looks to me like this may be resolved in Trusty due to the following changelog entries:
apt (0.9.12) unstable; urgency=low
[ Christian Perrier ]
* Fix typo in apt-private/private-show.cc. Thanks to Benjamin
Keresa. Closes: #724073
[ Mark Hymers ]
* fix libapt-inst for >2G debs (closes: #725483)
[ David Kalnischkies ]
* don't strip :any from dependencies in single-arch (Closes: 723586)
* pkg from only trusted sources keeps being trusted (Closes: 617690)
* compression-neutral message for missing data.tar member (Closes: 722710)
* print-uris prints regardless of quiet-level again (Closes: 722207)
* retry without partial data after a 416 response (Closes: 710924)
* replace "filesize - 1" trick in http with proper 416 handling
* fix partial (206 and 416) support in https
* handle complete responses to https range requests (Closes: 617643, 667699)
(LP: 1157943)
* don't consider holds for autoremoval (Closes: 724995)
* put fetch errors in 'source' on our errorstack
* use pkgAcqArchive in 'download' for proper errors
* fix lzma-support detection via xz binary
* do not ++ on erased package pointers in autoremove
It looks to me like this may be resolved in Trusty due to the following changelog entries:
apt (0.9.12) unstable; urgency=low
[ Christian Perrier ] private- show.cc. Thanks to Benjamin
* Fix typo in apt-private/
Keresa. Closes: #724073
[ Mark Hymers ]
* fix libapt-inst for >2G debs (closes: #725483)
[ David Kalnischkies ]
* don't strip :any from dependencies in single-arch (Closes: 723586)
* pkg from only trusted sources keeps being trusted (Closes: 617690)
* compression-neutral message for missing data.tar member (Closes: 722710)
* print-uris prints regardless of quiet-level again (Closes: 722207)
* retry without partial data after a 416 response (Closes: 710924)
* replace "filesize - 1" trick in http with proper 416 handling
* fix partial (206 and 416) support in https
* handle complete responses to https range requests (Closes: 617643, 667699)
(LP: 1157943)
* don't consider holds for autoremoval (Closes: 724995)
* put fetch errors in 'source' on our errorstack
* use pkgAcqArchive in 'download' for proper errors
* fix lzma-support detection via xz binary
* do not ++ on erased package pointers in autoremove