The problem seems to be linux-meta-2.6.17.11 packages that have been uploaded to edgy-security without corresponding kernel packages.
For example the meta package linux-image-generic now depends on linux- image-2.6.17-11-generic which does not exist in the repository. -- Unmet dependency in metapackage linux-image-generic https://launchpad.net/bugs/84016 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs