I've just released a beta1 tarball of what will became Vala Toys for
gEdit 0.12.
If you want a Vala Toys version that works well with Vala 0.12, the new
gEdit 3.0 and Gtk+ 3.0 please download it at:
http://vtg.googlecode.com/files/vtg-0.12.0.0-beta1.tar.bz2
and don't forget to file a bug if you find a crash or a regression from
the previous 0.11 release ( http://code.google.com/p/vtg/issues/entry ).
Happy hacking,
Andrea