Things how i ran into this:
Trying to upgrade to Sid i ran into 2 problems:
apt-get dist-upgrade
was catched in a loop trying to keep a library which was needed for audacious, gimp, mplayer2, etc.
I finally picked aptitude full-upgrade which completed the dist-upgrade (though pretty much anything X-related seem to be gone ...

).
After rebooting no new kernel is installed.