[Staffslug] KDE and Thunderbird

Hi Thanks to everyone who replied to my question about calendars yesterday. I have decided to use web calendar at the moment, but i do like the idea of the sunbird project from Mozilla, so I will be having a nose round to see what I can achieve with that. I now have an odder question to see if people have come accross. I am running Debian Unstable with KDE 3.5. When I save my session all my applications remember they were open and open up again when I log back in, however Thunderbird doesnt, does anyone have any ideas why, or how to make it do so ? Thanks Ben