Install Skype in Debian Etch AMD64

Skype offers only the 32 bit version for Linux; but this can be run in 32bit emulation in AMD64. The easiest procedure is to get and install both the Debian Etch package, and also the static binary. Follow these steps (as a "root" user):

troubleshooting

(this troubleshooting is useful for people using 32bit Linux as well)
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