Probe como mil cosas, instalarlo del deb, compilandolo yo, del bz, por apt, etc, y nada. (lo de copiar el archivo liblflashplayer.so lo probe en todas las carpetas que me imagine, mozilla, firefox, iceweasel, epiphany (el que uso), etc, pero no hay caso.) Ahora probe el método de ese blog y....
Agregue al sources.list;
# vim /etc/apt/sources.list
deb http://ftp.us.debian.org/debian/ lenny main non-free contrib
deb-src http://ftp.us.debian.org/debian/ lenny main non-free contrib
Y cuando hice el apt-get update:
Cita: Failed to fetch http://ftp.us.debian.org/debian/dists/lenny/main/binary-i386/Packages.bz2 MD5Sum mismatch
....
Y cuando hice el apt-get install mozilla-plugin-gnash:
Cita: Reading package lists... Done
Building dependency tree... Done
Package mozilla-plugin-gnash is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
W: Couldn't stat source package list http://ftp.us.debian.org lenny/main Packages (/var/lib/apt/lists/ftp.us.debian.org_debian_dists_lenny_main_binary-i386_Packages) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Package mozilla-plugin-gnash has no installation candidate
Parece que no hay caso con el flash player :S