Comment 26 for bug 429035

I installed the latest iwlwifi drivers (from http://linuxwireless.org/en/users/Download, not by installing a new kernel), and am getting *vastly* improved wireless connection stability. I didn't change anything else, and it's still in WPA. I'm still on Wicd (which i know much prefer to nm, actually - much more granular in its settings, and uses the underlying tools - it's more geeky and less magic, if you will).

Others with this problem should also try to install newer drivers.

I compiled the drivers from source, but you can also get a modules-backport package which in theory should be just as recent; see http://linuxwireless.org/en/users/Download#Getting_compat-wireless_on_Ubuntu