I can also confirm after installing the latest upstream kernel (linux-image-2.6.35-999-generic_2.6.35-999.201006281005_amd64) the problem is solved.
I can also confirm after installing the latest upstream kernel (linux- image-2. 6.35-999- generic_ 2.6.35- 999.20100628100 5_amd64) the problem is solved.