/usr/share/applications/xfce4-autostart-editor.desktop refers to Icon=xfce4-autostart-editor but such a file is inexistent (Ubuntu Feisty 7.04). It causes menu entry for Autostarted Applications to appear without an icon.
*** Bug 3250 has been marked as a duplicate of this bug. ***
Created attachment 1352 Proposed icon Here is a proposed icon from Jozsef Mak (jozmak AT gmail DOT com), using the tango palette. Maybe it'll be useful.
Committed with revision 26408. 2007-11-29 Benedikt Meurer <benny@xfce.org> * icons/, xfce4-autostart-editor/main.c: Add icon from Jozsef Mak <jozmak@gmail.com> for the autostart editor. Bug #3215.