Check it here, or just read This hastily copy-pasted phone post:

2.4.1.1 The one about Engrams.

This patch is intended to improve the quality of life in Destiny:Rise of Iron.

Activities
Strikes
Fixed an issue where The Taken Archon Priest in the Winter's Run Strike was not dropping Skeleton Keys at the intended rate

Crucible
Maps
Fixed an issue where players were able to access the rooftops on Skyline

Items
Fixed an issue where Rise of Iron Vanguard and Crucible weapons were not decrypting from Engrams
Fixed an issue where Comitatus was continuing to not drop properly from Faction Packages for players who own Kondratyuk's Escape
Fixed an issue where Armor decrypted from Dusty Engrams was dismantling into Legendary Marks
It will now dismantle into 1 Silver Dust
Removed Silver Dust cost to apply Iron Lord, Trials of Osiris, and Heroic Mode Raid Armor Ornaments
Players will now earn SIVA Key Fragments at an overall increased rate
The first time a Raid boss is killed on Normal difficulty they will drop three SIVA Key Fragments. For the next kill that week, they will drop two, and then one for the third kill that week
After the fourth or greater kill, the boss will no longer drop SIVA Key Fragments for the week
The same behavior will occur for killing Heroic bosses

Fixed an issue where Comitatus was continuing to not drop properly from Faction Packages for players who own Kondratyuk's Escape

Holy crap. I will henceforth call this the Immortal Bug.

Fixed an issue where Comitatus was continuing to not drop properly from Faction Packages for players who own Kondratyuk's Escape

Holy crap. I will henceforth call this the Immortal Bug.

Right? Second time they claim to have fixed it in this xpac.

So... seems to be working.