Description of problem:
$SUBJECT, furthermore, you see 2 "Mugshot" entries in the "Startup Programs" tab
of (F)->System->Preferences->Personal->Sessions.

Version-Release number of selected component (if applicable):
mugshot-1.1.49-1.fc7 (from updates-testing)

How reproducible:
Easy.

Steps to Reproduce:
1. Enable splash screen during desktop startup (gconf key
/apps/gnome-session/options/show_splash_screen)
2. (Re-)Login
  
Actual results:
Mugshot icon seen twice in splash screen.

Expected results:
Mugshot icon seen once.

Additional info:
There are two mugshot files in /usr/share/gnome/autostart, namely
mugshot.desktop and mugshot-autostart.desktop. Both differ only slightly:

nils@wombat:/usr/share/gnome/autostart> diff -u mugshot*
--- mugshot-autostart.desktop   2007-08-02 20:21:31.000000000 +0200
+++ mugshot.desktop     2007-08-02 20:21:32.000000000 +0200
@@ -4,9 +4,10 @@
 Name=Mugshot
 GenericName=Mugshot
 Comment=Companion software for mugshot.org
-Exec=mugshot --no-show-window
+Exec=mugshot
 Terminal=false
 Type=Application
 Icon=mugshot
 StartupNotify=false
 Categories=Network;GNOME;GTK;X-Fedora;X-Red-Hat-Base;
+X-Desktop-File-Install-Version=0.12

After being logged in, only one mugshot process is running so I guess that one
of these files can be dropped.