From: Mike N. 

On Tue, 25 Jul 2006 20:49:01 +1000, John Beckett
 wrote:

>Since you are now a (potential) Linux guru, you should install Wireshark
>(the new Ethereal) and sniff network traffic to see exactly what is
>happening.

   I was able to reproduce this and see the same thing on the Barkto news
group.    The news server actually switches into 'cripple mode' - sending
one character at a time and waiting for the Ack before sending the next character.

  But it's not repeatable.  I tried Telnet and everything worked at normal
speed.  I went back to Thunderbird and it worked at normal speed.

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