Two thoughts: a 25 hour cycle fits with the five hour league interval; it might have started out as a mistake due to a server restart/the AotA update and the 25 hours is so that the reset time slowly drifts from noon back to midnight.
So have we confirmed the pattern to be 25 hours? Neoncat and I are the only ones signed up to check time periods today which won't be that useful if we haven't.
So wait, since I already got the loot fairy yesterday at Temple of Terror, I can't get it again today? Bummer.
I believe you can get it again, as long as Temple of Terror has reset. I believe people think the loot fairy will change in an hour?
If you haven't played it since the reset (00:00UTC) you should be able to play it again in the next 50 minutes to get it.
The Loot Fairy has left the Temple! (19:22 UTC) Let the hunt begin again! I was going to reset the tracker, but everything was already marked "unknown" except Yellow Dragon which was marked "absent". Anyone know when Yellow Dragon was marked?
Oooh, Ooh! I found it! The Wizard's Workshop. UREE(R) Getting the Sparking Shell and Shimmering Hood on the same drop seems like the game's trying to tell me something...
UREL-R God dammit I hate the loot fairy. Second time it provides me with a Legendary since it exists. First time it was St darqar that I allready had, and now Unholy Nimbus that I allready had too (why not the misanthrope staff so that I can finally have all level 1-5 items? :'( ) So fairy stop trolling me and next L. item I want it in a high level adventure!