I am running the latest Ubuntu 11.10 system up-to-date with gnome-shell version 3.1.5
I've tried to install noally and poweroption extensions to gnome-shell via extracting them to ./local/share/gnome-shell/extensions/
I've restarted the UI and also the comp many times, i've also modified the metadata for the gnome-shell version to 3.1.5 per each extension but no signs of the extension working.
EDIT:
using the looking glass I found errors which say that it couldn't load each of the extensions because they are not compatible with the version of gnome shell or gjs