Remember the original notes mentioned something about a mind flay targetting bug? Well that particular note has now been updated:
Mind Flay - Fixed a bug with targeting where you would not deal damage if not facing the target while channeling. Also corrected an issue where the damage from this ability was slightly delayed.
I'm not sure if this is an entire fix or only a partial one. "Slight delay" doesn't seem to describe fully what's going on with mind flay's ticks, but it does at least sound like Blizzard is addressing the problem.
I still see nothing about the issue with pain and suffering, where it ignores shadow weaving when refreshing shadow word: pain. The only possibility is this rather cryptic bug fix:
Shadow Word: Pain now will gain the correct damage modifiers for the creature type of the target.
Warlocks have a couple of similarly mystifying fixes. I was under the impression our spells hit all types of creature equally, but I'm not ashamed to stretch the plausible and hope that 'damage modifiers' might include shadow weaving with pain and suffering.
Edit: Ho Ho points out in the comments this probably refers to racial bonuses.
If anybody knows any better, please shout out.