Version: 1.2.4 (using KDE KDE 3.5.6)
Installed from: SuSE RPMs
I normaly leave Kontact iconised at log-out.
On log-in Kontact is started because of session restore.
After updating to KDE 3.5.6 Kontact is started twice on session restore, complaining because there may run but one instance of it for a particular user.
*** This bug has been marked as a duplicate of 143187 ***