It seems like desktop team made compiz-gnome optional and gnome-shell default in comps for F14 when it seemed GNOME 3 would be the default. Now we've gone back to GNOME 2, gnome-shell has been set back to optional, but compiz-gnome has not been set back to default. So now you don't have either gnome-shell or compiz available by default, and desktop-effects is not installed.
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Created attachment 452169 [details] readd compiz-gnome I haven't tested CD size with this, but there's some current headroom on both i386 and x86_64.
Matthias tells me compiz-gnome is back in the default install comps now.
indeed, matthias fixed it 30 mins ago.