I forgot to mention that, unlike the original poster (Nick), installing 2.6.34-999 did not solve the problem for me - in fact, it made it worse (a subjective opinion, since this is not easily measurable). I have also installed linux-backports-modules-wireless-lucid-generic, to no avail. I will try installing a mainline kernel that is closer to the one currently running (per http://kernel.ubuntu.com/~kernel-ppa/info/kernel-version-map.html) and I will get back with details.
I forgot to mention that, unlike the original poster (Nick), installing 2.6.34-999 did not solve the problem for me - in fact, it made it worse (a subjective opinion, since this is not easily measurable). I have also installed linux-backports -modules- wireless- lucid-generic, to no avail. I will try installing a mainline kernel that is closer to the one currently running (per http:// kernel. ubuntu. com/~kernel- ppa/info/ kernel- version- map.html) and I will get back with details.