KDE problem - Only desktop wallpaper visible

[Sundar]

> With GNOME rename the directory /home/<yourlogin>/.kde to something 
> like /home/<yourlogin>/.kde.bak to get a fresh KDE environment. Then 
> login to KDE and check if the problem is still there. If everything is 
> OK, there is a problem with some configuration of the previous KDE 
> environment. Now, if everything works, search for important things in the 
> old directory (now .kde.bak) and move them to the new directory (.kde). 
> E.g. in /home/<yourlogin>/.kde.bak/share/apps/kmail you can find your old 
> mail (if you are using kmail).

Thanks Nils!! That helped. I am able to log into new KDE without issues
But is there a log which I can check to identify the cause of this
problem?  I just dont want to get into the same problem again.