Game Mechanics: Fall Damage not registering in some cases

[Rygar]

I was in the Hole, on my level 1 rogue. I jumped off from the undead tower cliff to yael area and landed with zero damage. I only have 27hp and no safefall skill. I tried 4 times and was unable to kill myself from various cliff faces in the Hole (talking huge drops, was not using any FPS tricks).

Others are taking fall damage elsewhere, does this have something to do with recent changes? Is it unique to the Hole? to Rogues?

One thought is I had a true zero weight (no gear, no coin). Does that by-pass fall damage calculation somehow?

I know before patch, others even with high FPS were still taking some damage from those heights.