Created attachment 5555 Fix display desktop file that include extension in icon name.. When desktop files include a icon name with extention like "fedorausb.png", g_themed_icon_new() can not create the icon.. and xfdesktop show a ugly icon.. This is practically copy and pastes from Thunar code: See http://git.xfce.org/xfce/thunar/tree/thunar/thunar-file.c#n945 Regards.
Thanks again! Pushed to master in: http://git.xfce.org/xfce/xfdesktop/commit/?id=ae4013a095820417b090db14a6d037e8956fb67c