Tanks nearly Invincible +1 for Lethality!

I've noticed since this last patch was introduced, ADC and AD assassins don't do any damage to tanks after the first couple levels. I suspect something in the Lethality mechanic is the culprit, but who knows. Something clearly is broken. Not sure how long they'll let us get away with this, so get it while it's hot.

Seriously though, I can go take a piss with an assassin beating on me and come back with most of my health. =P