Comment 4 for bug 297965

I grabbed and installed the new(ish?) version of the kernel, 2.6.27-11, from intrepid-proposed (along with the related packages). This seems to have improved the situation for me. (Previously, using ath9k, I got terrible performance on a 802.11n network but now I am able to achieve transfers over 1 MB/sec on the LAN.) I will continue testing to see if there are any problems, but even if it is not fixed, it seems for the moment to be improved enough to be usable.

Have you tried with 2.6.27-11?