I haven't tested with Edgy, but this is still an issue with the latest updates to Dapper.
The following shows up in the .kde/share/config/session/kwin_* file: desktop5=2 fsrestore5=0,0,0,0 fullscreen5=0 geometry5=0,0,1600,1174 iconified5=false keepBelow5=false maximize5=3 resourceClass5=mozilla-thunderbird-bin resourceName5=gecko restore5=0,0,1287,959 sessionId5= shaded5=false shortcut5= skipPager5=false skipTaskbar5=false staysOnTop5=false sticky5=false userNoBorder5=false windowRole5= windowType5=Normal wmClientMachine5=localhost wmCommand5=mozilla-thunderbird-bin and I see the following in .xsession-errors: ... kio (KLauncher): KLauncher: Got exec_blind('firefox', ...) kdecore (KLibLoader): The KLibLoader contains the library kcm_nsplugins (0x81c6c60) kdecore (KLibLoader): The KLibLoader contains the library kcm_khotkeys_init (0x81c0ad0) kdecore (KLibLoader): The KLibLoader contains the library kcm_keyboard (0x81caf48) kdecore (KLibLoader): The KLibLoader contains the library kcm_access (0x81db670) kdecore (KLibLoader): The KLibLoader contains the library kcm_style (0x81ce220) kdecore (KLibLoader): The KLibLoader contains the library kcm_bell (0x81c6348) kdecore (KLibLoader): The KLibLoader contains the library kcm_laptop (0x81cb8b0) kdecore (KLibLoader): The KLibLoader contains the library kcm_keys (0x81ca1a0) kdecore (KLibLoader): The KLibLoader contains the library kcm_arts (0x81dd098) kdecore (KLibLoader): The KLibLoader contains the library kcm_energy (0x81c5f70) kdecore (KLibLoader): The KLibLoader contains the library kcm_input (0x81c1318) DCOP: unregister 'kcminit' kdeinit: Got EXEC_NEW 'firefox' from launcher. Could not load library! Trying exec.... kio (KLauncher): firefox (pid 15820) up and running. kio (KLauncher): KLauncher: Got exec_blind('thunderbird', ...) kdeinit: Got EXEC_NEW 'thunderbird' from launcher. Could not find 'thunderbird' executable. kdeinit: PID 15822 terminated. ... I've attached the complete kwin_* file and the complete xsession-errors. -- Mozilla Thunderbird doesn't restart when Kubuntu session is reloaded https://launchpad.net/bugs/49534 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs