I had the exact same issue. This is Edgy, and XFCE's autostart was trying to launch evolution-alarm-notify itself, though Evolution already installed a .desktop for the very same purpose (cf. "dpkg -S /etc/xdg/autostart/evolution-alarm-notify.desktop").
To fix it: launch "xfce4-autostart-editor" and disable 'Evolution Alarm Notifier" there. Hth, Francis. -- evolution-alarm-notify crashes on startup (xfce?) https://launchpad.net/bugs/66860 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
