Internet sharing sometimes stop working

I haven't detected what exactly causes this to happen, but it has happened 4
times since the install of windows vista rc1 (yesterday). Restarting both
network cards doesn't help. Pinging the computer which has the internet
connection from other computer works, but the internet sharing doesn't. The
only solution I have found is restarting windows.

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http://windowshelp.microsoft.com/com...orking_sharing