Not sure what package to report a bug against, so here goes. Looks like some Replaces: are incorrectly versioned?
Selecting previously deselected package x-dev. Unpacking x-dev (from .../x-dev_4.3.0-0pre1v5_all.deb) ... dpkg: error processing /var/cache/apt/archives/x-dev_4.3.0-0pre1v5_all.deb (--unpack): trying to overwrite `/usr/X11R6/include/X11/DECkeysym.h', which is also in package xlibs-dev dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxext6. Unpacking libxext6 (from .../libxext6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxext6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXext.so.6.4', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxext-dev. Unpacking libxext-dev (from .../libxext-dev_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxext-dev_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/include/X11/extensions/MITMisc.h', which is also in package xlibs-dev dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxv1. Unpacking libxv1 (from .../libxv1_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxv1_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXv.so.1.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) [...] Preparing to replace xlibs 4.3.0-0pre1v4 (using .../xlibs_4.3.0-0pre1v5_all.deb) ... Unpacking replacement xlibs ... dpkg: error processing /var/cache/apt/archives/xlibs_4.3.0-0pre1v5_all.deb (--unpack): trying to overwrite `/etc/X11/xkb/README', which is also in package xlibs-data [...] Selecting previously deselected package libx11-6. Unpacking libx11-6 (from .../libx11-6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libx11-6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/X11/locale/lib/common/ximcp.so.2', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) [...] Selecting previously deselected package libice6. Unpacking libice6 (from .../libice6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libice6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libICE.so.6.3', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libice-dev. Unpacking libice-dev (from .../libice-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libsm6. Unpacking libsm6 (from .../libsm6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libsm6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libSM.so.6.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libsm-dev. Unpacking libsm-dev (from .../libsm-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxi6. Unpacking libxi6 (from .../libxi6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxi6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXi.so.6.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxi-dev. Unpacking libxi-dev (from .../libxi-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxt6. Unpacking libxt6 (from .../libxt6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxt6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXt.so.6.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxmu6. Unpacking libxmu6 (from .../libxmu6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxmu6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXmu.so.6.2', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxt-dev. Unpacking libxt-dev (from .../libxt-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxmu-dev. Unpacking libxmu-dev (from .../libxmu-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxmuu1. Unpacking libxmuu1 (from .../libxmuu1_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxmuu1_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXmuu.so.1.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxmuu-dev. Unpacking libxmuu-dev (from .../libxmuu-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxp6. Unpacking libxp6 (from .../libxp6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxp6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXp.so.6.2', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxp-dev. Unpacking libxp-dev (from .../libxp-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxpm4. Unpacking libxpm4 (from .../libxpm4_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxpm4_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXpm.so.4.11', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxpm-dev. Unpacking libxpm-dev (from .../libxpm-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxrandr2. Unpacking libxrandr2 (from .../libxrandr2_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxrandr2_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXrandr.so.2.0', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxrandr-dev. Unpacking libxrandr-dev (from .../libxrandr-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxtrap6. Unpacking libxtrap6 (from .../libxtrap6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxtrap6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXTrap.so.6.4', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxtrap-dev. Unpacking libxtrap-dev (from .../libxtrap-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package libxtst6. Unpacking libxtst6 (from .../libxtst6_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxtst6_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXtst.so.6.1', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) Selecting previously deselected package libxtst-dev. Unpacking libxtst-dev (from .../libxtst-dev_4.3.0-0pre1v5_powerpc.deb) ... Selecting previously deselected package pm-dev. Unpacking pm-dev (from .../pm-dev_4.3.0-0pre1v5_all.deb) ... Selecting previously deselected package libxft1. Unpacking libxft1 (from .../libxft1_4.3.0-0pre1v5_powerpc.deb) ... dpkg: error processing /var/cache/apt/archives/libxft1_4.3.0-0pre1v5_powerpc.deb (--unpack): trying to overwrite `/usr/X11R6/lib/libXft.so.1.1', which is also in package xlibs dpkg-deb: subprocess paste killed by signal (Broken pipe) [...] Errors were encountered while processing: /var/cache/apt/archives/x-dev_4.3.0-0pre1v5_all.deb /var/cache/apt/archives/libxext6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxext-dev_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxv1_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/xlibs_4.3.0-0pre1v5_all.deb /var/cache/apt/archives/libx11-6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libice6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libsm6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxi6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxt6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxmu6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxmuu1_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxp6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxpm4_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxrandr2_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxtrap6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxtst6_4.3.0-0pre1v5_powerpc.deb /var/cache/apt/archives/libxft1_4.3.0-0pre1v5_powerpc.deb -- Earthling Michel Dänzer | Debian (powerpc), X and DRI developer Software libre enthusiast | http://svcs.affero.net/rm.php?r=daenzer