Bug #778876 is as yet unresolved after 2 months. I can't see any
discussion of this issue on this list or in the linux-image changelog
to explain its omission.
Obviously no DKMS support is available "out of the box as a result of
this. The linux-image-3.19* and linux-headers-3.19* packages are all
available.
linux-kbuild-3.18 and linux-tools-3.18 /are/ still listed as available
in experimental (along with a few armel/sh4 kernel images) - but with
no reverse dependencies as everything else kernel-wise in experimental
is now 3.19-based AFAICS.
Thanks for any input,
Nick