Comment 8 for bug 363738

I face a similar problem with Ubuntu 09.10 then 10.04LTS then 10.04-1LTS.
I'm running an Atheros 5001 chip with ath5k driver.
I changed "network-manager" to "wicd" with some improvement, reverted to "network-manager" and added "wifi radar" then removed the last. Things deteriorated with the last kernel update a few days ago with 2.6.32-26 and I reverted to 2.6.32-25, which was far better on my computer.
I eventually found the folowing bug thread :
                 https://bugs.launchpad.net/ubuntu/lucid/+source/network-manager/+bug/373680
According to the procedure proposed there I replaced my "network-manager 0.8-0ubuntu3" packet by "0.8-0ubuntu3+volanin1"
(see Question #135241) and my wifi connexion is very steady now, not perfect (ping test will show a loss of nearly 10%) but much better. The remaining lack of performance is shown by the ping test but while surfing on the net I don't face anymore visible disconnections.