Comment 152 for bug 173890

Gutsy 7.10 - Gnome desktop
Linux ubuntu 2.6.22-14 generic
[Fresh install on an A21M Thinkpad laptop w/128Mb of memory]

~$ sudo apt-get install --reinstall flashplugin-nonfree
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  konqueror-nsplugins ttf-xfree86-nonfree xfs
The following NEW packages will be installed:
  flashplugin-nonfree
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/18.1kB of archives.
After unpacking 160kB of additional disk space will be used.
Preconfiguring packages ...
Selecting previously deselected package flashplugin-nonfree.
(Reading database ... 128126 files and directories currently installed.)
Unpacking flashplugin-nonfree (from .../flashplugin-nonfree_9.0.48.0.2+really0ubuntu12_i386.deb) ...
Setting up flashplugin-nonfree (9.0.48.0.2+really0ubuntu12) ...
Downloading...
--12:39:05-- http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_9_linux.tar.gz
           => `./install_flash_player_9_linux.tar.gz'
Resolving fpdownload.macromedia.com... 72.246.170.70
Connecting to fpdownload.macromedia.com|72.246.170.70|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3,036,127 (2.9M) [application/x-gzip]

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12:39:24 (154.95 KB/s) - `./install_flash_player_9_linux.tar.gz' saved [3036127/3036127]

Download done.
md5sum mismatch install_flash_player_9_linux.tar.gz
The Flash plugin is NOT installed.

So I downloaded flash player directly from Adobe's website:
http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash&promoid=BONRN
http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_9_linux.tar.gz

$ md5sum install_flash_player_9_linux.tar.gz
93b7c48eaa492237b807a3ae1de65cf9 install_flash_player_9_linux.tar.gz

Unpacked and copied libflashplayer.so to ./mozilla/plugins on my home directory. Flash now works in FF 2.0.0.11 and SeaMonkey 1.1.7.