Bug#234857: can't install libxext6 version 4.3.0-2 - file libXext.so.6.4 is also in package xlibs

[Mantas Kriauciunas <mantas@akl.lt>]

Package: libxext6
Version: 4.3.0-2
Severity: important


Hi,

I did apt-get install x-window-system-core/unstable but during install I got 
these errors:

Selecting previously deselected package libxext6.
(Reading database ... 91190 files and directories currently installed.)
Unpacking libxext6 (from .../libxext6_4.3.0-2_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libxext6_4.3.0-2_i386.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)
Preparing to replace xlibmesa-gl-dev 4.2.1-11 (using .../xlibmesa-gl-dev_4.3.0-2_i386.deb) ...
Unpacking replacement xlibmesa-gl-dev ...
Errors were encountered while processing:
 /var/cache/apt/archives/libxext6_4.3.0-2_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

It seems libxext6 should pre-depend on xlibs (>= 4.3.0-2), because xlibs 
version 4.3.0-0pre1v1 still has file /usr/X11R6/lib/libXext.so.6.4

Btw, why x-window-system-core package dependancies arent versioned ? I'm 
installing x-window-system-core version 4.3.0-2 but lots of dependant 
packages (for example xserver-xfree86) aren't updated in this way. It 
seems, that x-window-system-core version 4.3.0-2 should depend on other
X system packages the same version, for example on xserver-xfree86 version 
4.3.0-2
Should I report another bug about this ?

-- System Information:
Debian Release: 3.0
Architecture: i386
Kernel: Linux aukselis.is.lt 2.6.2-1-686 #1 Sat Feb 7 13:49:20 EST 2004 i686
Locale: LANG=lt_LT, LC_CTYPE=lt_LT