Oh, well. If what is becomes faded, perhaps we can turn our attention to what might have been.
That said, what's your favorite rumor, half-truth, whispering, non-easter-egg, or just plain random bit of idle speculation from DM?
These probably would mostly be fond memories from back in the old days, before there was a DM Encyclopedia or much of an Internet to put it on, when everyone knew a guy who knew a guy who made Ful Bombs.
That'd be at the top of my list, of course: making Ful Bombs.
As an aside to this one, anything involving the Gor rune.
The first draft of the DM adventurer's handbook is full of little things like this, before the official FTL edition cleaned it up. It posits that swamp slimes were related to screamers-- which it called shriekers for some reason, worms can't be hit by spells because they fly over their heads (maybe misunderstanding what was happening when you fired spells on the wrong side...?), and that Tiggy was female. Oh wait, they got that one right, even though almost nobody else at the time did.

One that comes to mind from my own experience was the thought that rock monsters took more damage when they were popping out from under their rock piles. This one actually stuck around for me, as materializers showed that the code did make such a distinction at times. Still, it was but idle speculation, in the end.
So, what do you all think?