I've experienced the same issue and also Alexander Jones' fix works for me too.
A workaround based on savagex post wrote on 2008-06-05 consisits on openning "System>Preferences>Sessions" and on "Startup Programs" tab add an entry like "Name: Trash applet starter; Command: /usr/lib/gnome-applets/trashapplet". Now without Alex's fix also the trash bin applet becomes visible after next session login.
I've experienced the same issue and also Alexander Jones' fix works for me too.
A workaround based on savagex post wrote on 2008-06-05 consisits on openning "System> Preferences> Sessions" and on "Startup Programs" tab add an entry like "Name: Trash applet starter; Command: /usr/lib/ gnome-applets/ trashapplet" . Now without Alex's fix also the trash bin applet becomes visible after next session login.