getting down to cases

$sudo dpkg –i install_flash_player_10_linux.deb
Selecting previously deselected package adobe–flashplugin.
(Reading database ... 124092 files and directories currently installed.)
Unpacking adobe–flashplugin (from install_flash_player_10_linux.deb) ...
dpkg: dependency problems prevent configuration of adobe–flashplugin:
 adobe–flashplugin depends on libatk1.0–0 (>= 1.20.0); however:
  Version of libatk1.0–0 on system is 1.12.4–3.
 adobe–flashplugin depends on libc6 (>= 2.4); however:
  Version of libc6 on system is 2.3.6.ds1–13etch7.
 adobe–flashplugin depends on libcairo2 (>= 1.6.0); however:
  Version of libcairo2 on system is 1.2.4–4.1+etch1.
 adobe–flashplugin depends on libfreetype6 (>= 2.3.5); however:
  Version of libfreetype6 on system is 2.2.1–5+etch2.
 adobe–flashplugin depends on libgtk2.0–0 (>= 2.12.0); however:
  Version of libgtk2.0–0 on system is 2.8.20–7.
 adobe–flashplugin depends on libnspr4–0d; however:
  Package libnspr4–0d is not installed.
 adobe–flashplugin depends on libnss3–1d; however:
  Package libnss3–1d is not installed.
 adobe–flashplugin depends on libpango1.0–0 (>= 1.20.1); however:
  Version of libpango1.0–0 on system is 1.14.8–5.
dpkg: error processing adobe–flashplugin (––install):
 dependency problems – leaving unconfigured
Errors were encountered while processing:
 adobe–flashplugin

…then, later …

$sudo apt–get upgrade
Reading package lists... Done
Building dependency tree... Done
You might want to run `apt–get –f install' to correct these.
The following packages have unmet dependencies:
  adobe–flashplugin: Depends: libatk1.0–0 (>= 1.20.0) but 1.12.4–3 is installed
                     Depends: libc6 (>= 2.4) but 2.3.6.ds1–13etch7 is installed
                     Depends: libcairo2 (>= 1.6.0) but 1.2.4–4.1+etch1 is installed
                     Depends: libfreetype6 (>= 2.3.5) but 2.2.1–5+etch2 is installed
                     Depends: libgtk2.0–0 (>= 2.12.0) but 2.8.20–7 is installed
                     Depends: libnspr4–0d but it is not installed
                     Depends: libnss3–1d but it is not installable
                     Depends: libpango1.0–0 (>= 1.20.1) but 1.14.8–5 is installed
E: Unmet dependencies. Try using –f.

…followed by…

$sudo apt–get –f install
Reading package lists... Done
Building dependency tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  libnspr4–0d
The following packages will be REMOVED:
  adobe–flashplugin
The following NEW packages will be installed:
  libnspr4–0d
0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 139kB of archives.
After unpacking 9765kB disk space will be freed.
Do you want to continue [Y/n]? y
Get:1 http://http.us.debian.org etch/main libnspr4–0d 1.8.0.15~pre080614d–0etch1 [139kB]
Fetched 139kB in 7s (18.8kB/s)
(Reading database ... 124100 files and directories currently installed.)
Removing adobe–flashplugin ...
Selecting previously deselected package libnspr4–0d.
(Reading database ... 124092 files and directories currently installed.)
Unpacking libnspr4–0d (from .../libnspr4–0d_1.8.0.15~pre080614d–0etch1_i386.deb) ...
Setting up libnspr4–0d (1.8.0.15~pre080614d–0etch1) ...