I am also seeing random network slowdowns on my Dell N-Series using a wired 
connection. (Kubuntu 9.10, all updates applied) It does not seem to affect 
local connections (e.g. connecting to Apache on the same box, which was not the 
case with the ipv6 bug and nsswitch.conf issue ). 

Cataloging my experiences here: http://yml.com/fv-b-1-545/Slow-DNS-
Lookups-in-Ubuntu-9-10--Karmic-Koala-.html

I have disabled ipv6 and edited nsswitch.conf which improved
performance, but I am still seeing very long connection delays and
random slowdowns in network connections. Running WinXp in VMWare on the
very same machine shows no such slowdowns, thereby eliminating any
questions about the network.

My feeling is this is a race condition. It seems to occur most
frequently when more than one process (or thread) attempts to make a
network connection (e.g. load up a bunch of tabs in firefox
simultaneously and at the same time pull mail using Thunderbird)

If there are any tests I can run to help track this down, please let me
know.

-- 
Internet ping very slow on Karmic Koala
https://bugs.launchpad.net/bugs/433972
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