Setting the default session in gdm.

[Lee McLain]

He all,
     I just had a strange situation happen.  All of a sudden, the
default session on my laptop changed from Fluxbox to Gnome without me
doing anything!
    I tried to log in by selecting Fluxbox, then logging out and then
logging back in, making sure that "Last" was the session selected. 
Nope, it just goes to Gnome.
    Does anyone know what could have happened to cause this?  How do I
change it back and make sure that it doesn't happen again in the
future?

Thanks,
Lee