I recently upgraded my stock HDD to a Samsung 840 SSD, which is a clone of my original HDD. Ever since I installed the SSD, f.lux no longer works. It tells me it is at 2300K (the Candle setting) yet it is bright as when I move the slider to the complete end of the spectrum. Nothing changes between Daylight and Sunset. Un-installing and re-installing multiple times have done nothing too. For those with SSD's, does f.lux work for you?