Thanks for all the testing everyone. It seems we have some conflicting results which is never good. Ricardo, since you are the original bug reporter can you comment if this is resolved for you with the newer 2.6.27 Intrepid kernel? Alpha5 should come out tomorrow so you can wait and test via a LiveCD if you like.
Tomas, would you be able to attach your dmesg output from when you booted with the 2.6.27 kernel. Thanks.