Version: (using Devel)
Installed from: Compiled sources
i used blur effect in release 4.4.75 and it works only panel notifications tooltips and aurorae window decoration...
i compiled bespin svn and i enabled argb but blur effect doesn't work with argb..
you can not activate the ARGB in style and enable the blur?
afaik the "to be blurred" region has to be set by the cilent (bespin in case)
no idea whether that's a great design (eg. if we can expect gnome support) but it's not done from the style so far.
errm, yes - bespin can do this since quite a while ;-)