Oh, it must be a stealth buff then, because blizzard's official 5.1 patch notes make no mention of Mind Sear and Cascade.
It was a hotfix last week; the PTR notes were changed to update the tooltip.
Originally Posted by Stanislav
so did it get buffed twice or not?
can anyone on live or PTR confirm the dmg?
Of course not. I don't see how people are getting confused here. Either some kind of degenerate disease struck last week, or people just can't read anymore.