Why does this happen ?

["Hans-J. Ullrich" <hans.ullrich@loop.de>]

Hi all, 

I wondered, why the additional installation of a library will deinstall the 
old one (and worth, the packages). IMO the libs should resize together 
without any harm, and more as long other packages do need them. Just take a 
look, what would happen, if I try this:

------------------

# LANG=C apt-get install libcurl4
Reading package lists... Done
Building dependency tree... Done
The following extra packages will be installed:
  nexuiz nexuiz-server
The following packages will be REMOVED:
  avscan clamav clamav-daemon clamav-freshclam clamsmtp hydrogen jigdo
  libclamav2 libcurl3 liblrdf0 libraptor1 raptor-utils streamtuner wengophone
The following NEW packages will be installed:
  libcurl4
The following packages will be upgraded:
  nexuiz nexuiz-server
2 upgraded, 1 newly installed, 14 to remove and 2 not upgraded.
Need to get 180kB/1686kB of archives.
After unpacking 46.3MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
#

--------------------------


Can someone explain the background behind this behaviour ? Someone must have a 
good reason for this.

Thanks for the help.

regards

Hans