talkie ~/src/Debian
% sudo dpkg -i iceowl_0.5-2_i386.deb iceowl-dev_0.5-2_i386.deb iceowl-extension_0.5-2_i386.deb 
Password:
Selecting previously deselected package iceowl.
dpkg: considering removing libnss3 in favour of iceowl ...
dpkg: no, cannot proceed with removal of libnss3 (--auto-deconfigure will help):
 firefox depends on libnss3 (>= 2:1.firefox1.5.dfsg+1.5.0.5-0ubuntu6.06.1)
  libnss3 is to be removed.
dpkg: regarding iceowl_0.5-2_i386.deb containing iceowl:
 iceowl conflicts with libnss3
  libnss3 (version 2:1.firefox2.0.0.6+1-0ubuntu1) is installed.
dpkg: error processing iceowl_0.5-2_i386.deb (--install):
 conflicting packages - not installing iceowl
Selecting previously deselected package iceowl-dev.
(Reading database ... 256863 files and directories currently installed.)
Unpacking iceowl-dev (from iceowl-dev_0.5-2_i386.deb) ...
Selecting previously deselected package iceowl-extension.
Unpacking iceowl-extension (from iceowl-extension_0.5-2_i386.deb) ...
dpkg: dependency problems prevent configuration of iceowl-dev:
 iceowl-dev depends on iceowl (= 0.5-2); however:
  Package iceowl is not installed.
 iceowl-dev depends on libnss3-dev; however:
  Package libnss3-dev is not installed.
dpkg: error processing iceowl-dev (--install):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of iceowl-extension:
 iceowl-extension depends on icedove | thunderbird; however:
  Package icedove is not installed.
  Package thunderbird is not installed.
dpkg: error processing iceowl-extension (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 iceowl_0.5-2_i386.deb
 iceowl-dev
 iceowl-extension
 talkie ~/src/Debian
% du -sh .
1.2G	.