Bug#390943: tries to overwrite '/usr/X11R6/bin', which is in package xgl

[Armin Berres <trigger@space-based.de>]

Thomas Ter-Borch wrote:
> Hi
>
> It looks like I still have the same problem as David Nusinow reportet in
> bugreport 390943. When I try to upgrading x11-common from 1:7.1.0-3 to
> 1:7.1.0-4 I get an error

> Gør klar til at erstatte x11-common 1:7.1.0-3 (med .../x11-common_1%
> 3a7.1.0-4_i386.deb)...
> Udpakker erstatning x11-common...
> dpkg: fejl under behandling af /var/cache/apt/archives/x11-common_1%
> 3a7.1.0-4_i386.deb (--unpack):
> forsøger at overskrive '/usr/X11R6/bin', som også er i pakken xgl
>
> my translation:"
> [tries to overwrite '/usr/X11R6/bin', which is in package xgl]

There is no package "xgl" in Debian. Did you install Xgl/Copiz from an 
external source? If yes try again after removing these packages.