I was affected by this problem as well and I can confirm that using 2.6.27-11 and the "nodfs" mount option the problem is solved. I tested this on x86 and x86_64.
I can add that with the -9 kernel the "/proc/fs/cifs/LinuxExtensionsEnabled" workarond wasn't working anymore (with previous revisions it worked smoothly, but it was a workaround)
I was affected by this problem as well and I can confirm that using 2.6.27-11 and the "nodfs" mount option the problem is solved. I tested this on x86 and x86_64.
I can add that with the -9 kernel the "/proc/ fs/cifs/ LinuxExtensions Enabled" workarond wasn't working anymore (with previous revisions it worked smoothly, but it was a workaround)