Hi Kevin,
I have test the last driver(version:9.18.10.3165, installer: Win64_15319.zip) before I post this thread. As I have said in previous post. When run the sample on CL_DEVICE_TYPE_CPU OpenCL device of Intel 3rd Core processor, the result is as expected. However when change the OpenCL device to CL_DEVICE_TYPE_GPU on Intel HD 4000, the sample give incorrect result.