Comment 1 for bug 397842

This must have been a transitional error in the archive. The abi has moved on to -15 and the packages there seem to be correct:

linux-image-generic_2.6.28.15.20_amd64.deb:
 new debian package, version 2.0.
 size 3534 bytes: control archive= 492 bytes.
     387 bytes, 12 lines control
     159 bytes, 2 lines md5sums
 Package: linux-image-generic
 Source: linux-meta
 Version: 2.6.28.15.20
 Architecture: amd64
 Maintainer: Ubuntu Kernel Team <email address hidden>
 Installed-Size: 32
 Depends: linux-image-2.6.28-15-generic, linux-firmware
 Section: metapackages
 Priority: optional
 Description: Generic Linux kernel image
  This package will always depend on the latest generic kernel image
  available.