Good free e-book on sleep
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 This guide is by a team of scientists in Australia who are working on green light glasses (re-timer) to set your circadian timing, and it's got a lot of good information on sleep. Price is right too. 
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 Oh I've got one .... Go to sleep Read by Samuel L. Jackson. Edit, Amazon gives you ONE free audiobook when you download audible. 
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 I hope you're not making a serious comparison, timpster. lol 
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 Which Windows, version of f.lux, and what's your graphics card (and driver version)? there might be some clues in those answers. 
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 @lorna if you have time, I'm interested in the interface you're seeing to reply to posts, a screenshot would be just dandy. 
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 Oh good lord, this again. 


