A bug where Glyph of Backstab interacted with Dirty Deeds to cause the glyph to benefit attacks other than Backstab was, apparently, recently fixed. However, there was concern that this bug fix would hurt Subtlety DPS too hard, so the Sub talent Sinister Calling is being buffed to compensate - full Sinister Calling will now award a 10% damage bonus to Backstab and Hemorrhage, instead of 5%. This buff will go live with patch 3.1.
Rogues are in a place in PvE that I don't recall them ever being in before Wrath: all three trees have viable raid specs. Most rogues seem to be Mut right now, but Combat is still holding its own, and I'm told that HaT specs are quite strong depending on the particular group and fight. It seems like the glyph bug wouldn't really have been affecting PvE much, given that raid mobs aren't often stunned or incapacitated, so this change acts as a straight buff for raiding HaTters. In PvP, on the other hand, this should keep Sub from getting stomped on too hard. Buffs are always so nice to write about - I like bringing good news to you guys.