Point 2) and 3) below is relevant for kdm:

+++ This bug was initially created as a clone of Bug #445503 +++

What I did:
- installed openSUSE 11.1 Beta 4 with KDE3 as the only desktop
- started the system (KDE3, auto login)
- logged out from KDE3
- clicked on my user name on the left side

=> the following error message is shown:

"Der gespeicherte Sitzungstyp "gnome" ist nicht mehr gültig. Bitte wählen sie einen neuen, Sonst wird die Voreinstellung verwendet."

which should be sth. like that in english:

"The selected session type "gnome" is not valid any longer. Please select another one. Otherwise the default session will be used."

What I think is wrong:
1.) the default session type should be set to one of the installed desktops during the installation process (I never installed gnome !)
2.) session type should be checked when pressing the login-in-button and not when selecting the user
3.) The last sentence of the error message (at least for the german translation) doesn't make sense: if the default session type is invalid, the default selection can of course not be used ;-)