editors/openoffice-org-3.3.0: serious issue with X11

[O. Hartmann]

Hello.
I just upgraded openoffice-3.2.1 to openoffice-org-3.3.0 and found 
myself in a serious issue. Opening openoffice works only sporadically, 
in most cases I get the error:

XDM authorization key matches an existing 
client!/usr/local/openoffice.org-3.3.0/openoffice.org3/program/soffice.bin 
X11 error: Can't open display:
    Set DISPLAY environment variable, use -display option
    or check permissions of your X-Server
    (See "man X" resp. "man xhost" for details)


Deleting .Xauthority or restarting the session via resetting xdm/Xorg or 
removing ~/.openoffice didn't help anyway.

Any suggestions are appreciated.

Thanks in advance,
Oliver