Hi,
it would be nice to have an option to set the background of a GtkTreeview to a
Pixmap(/buf?) and not only to a plain GdkColor. At the moment one can cange the
background of the GdkWindow the Cellrenders of the Treeview draw to, but it will
allways be overpainted by the solid backgrounds of the Cellrenderers. A
convenient solution to this would be either to allow the standardcellrenderers
drawing no colored box around their content or giving them the ability to render
pixmaps behind it. 
This feature would especially improve the compability of Gtk towards having
translucent (or at least pseudo-translucent) windows.
Thanks and Regards,
 Jan