I think I remember seeing him mention it somewhere online but I failed to find it within a few minutes of searching.
Edit: See also:
http://en.wikipedia.org/wiki/Non-24-hour_sleep-wake_disorderhttp://en.wikipedia.org/wiki/Circadian_rhythm_sleep_disorder#Normal_circadian_rhythms
Edit 2: In the August 27 2013 HP: MoR author’s note Eliezer says that he has non-24 sleep disorder (but that he recently fixed it with help from MetaMed).
I think I remember seeing him mention it somewhere online but I failed to find it within a few minutes of searching.
Edit: See also:
http://en.wikipedia.org/wiki/Non-24-hour_sleep-wake_disorder
http://en.wikipedia.org/wiki/Circadian_rhythm_sleep_disorder#Normal_circadian_rhythms
Edit 2: In the August 27 2013 HP: MoR author’s note Eliezer says that he has non-24 sleep disorder (but that he recently fixed it with help from MetaMed).