[PlanetCCRMA] sced missing from Gedit plugins

[Schindler, Allan]

I just upgraded my laptopfrom F15 to F16 using preupgrade, checked that Planet
CCRMA and RPM Fusion repositories were still configured, and updated
everything. Everything, including the 3.0.17-1.rt33.1.fc16 ccrma PAE kernel is
running smoothly, EXCEPT for an odd problem -- I have lost sced functionality
in gedit for editing/running SuperCollider. The sced plugin no longer appears
in gedit's Preferences->Plugins list.

SuperCollider runs fine with emacs (I get sound out).
Packages supercollider, supercollider-gedit, supercollider-world (all
version  3.4.5 release 1.fc16.ccrma) are installed.
supercollider.lang file exists in /usr/share/gtksourceview-2.0/language-specs.
supercollider.xml exists in /usr/share/mime/packages.
The sced directory and  the sced.gedit-plugin file both exist in /usr/lib/gedit-2/plugins
In desperation I also tried copying these into ~/.local/share/gedit/plugins.

(Other Sc packages installed include supercollider-libscsynth,
supercollider-mathlib, supercollider-midifile, supercollider-redclasses,
supercollider-reduniverse, supercollider-sclang, supercollider-vim,
supercollider-ambiem,  supercollider-bbcut2, supercollider-dewdrop,
supercollider-emacs, supercollider-extras, supercollider-debuginfo,
supercollider-bbcut2-debuginfo, supercollider-devel, supercollider-quarks,
supercollider-redclasses-debuginfo.)

One other anomoly, although probably unrelated: when opening Gedit, I get the
Gtk error message
    Failed to load module "pk-gtk-module"
although a yum check reveals:
Package PackageKit-gtk-module-0.6.22-2.fc16.i686 already installed and latest version

I have re-read all of the appropriate documentation I can find and googled for this
sced issue, but can't find any references.
I never ran into this issue before. After upgrades to Fedora 12,14 and 15 my
recollection is that the sced plugin always appeared automatically without 
additional configuration or fussing.

Have I missed something obvious? Any pointers would be greatly appreciated.
Allan Schindler
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