I have made a clock in 2.64a here is the blend file: http://sdrv.ms/Vo47Ca
This is the reference picture:
Switched to Blender 2.65 and as result got this:
The first image have 500 samples, the one in 2.65 have over 2000 samples and still noisy.
Rendering whit Geforce GT 660M on Windows 8 64bit. I don’t know if have any meaning, but the Blender starts whit a Visual C++ runtime error.