viking777 wrote: it must mean either that I am the only person still using gnome-shell on LMDE or it is something very specific to my machine

you know you're not the only one using the shell with lmde, so must be something specific to your setup, because

so the question is (if you want

)
- what the content of the preference file?
- what has been washed out in this particular install that hasn't been in debian proper? (and i have both installed here as well, they are both working, can't really tell the difference between one and the other)
-
BUT lmde requires now that a few adjustments are made (the most important imo we talked about it here for ages now - the standard preferences file is fine for the latest/incoming setups, kills any setup different from that.
viking777 wrote:I reverted to a disk image from a week ago and retried the updates with gnome-shell pinned, along with clutter, mutter and various other things that wanted to remove the older version of gnome-shell, but the result was no different, complete rubbish.
you shouldn't need to pin anything, gtk3.4, clutter, cogl (the all gang

) are coming in and in the same way in wheezy or lmde, the transition is not perfect, but the system are stable (heck, as you can see in your testing partition).
i'm telling this for so long now: you (we) are not using lmde-standard anymore, so please adapt it (adapt yourselves) or else ...
google (and Gene

) know what LLAP is. YW