DCOP server not running

["Attila Sulyok" <sulyok@mfa.kfki.hu>]

I upgraded from potato to testing.
I selected the latest Koffice (1.1b3).

I have got to the next strange state:
If I am a user, 'startx' fails with next message: DCOP server couldnot  be started. Typing 'dcopserver' results in 'Aborting, $DISPLAY is not  set.'

If I am root, 'startx' runs well and start a complete KDE session.

I don't have information about DCOP. I tried to find but without  success. 
Would you inform me about DCOP: what is this abreviation, what is  the config file I have to set, etc.

thanks.