Changes that aren't documented in the official changelog:
Concedes now happen immediately.
Searching "new" in the Collection Manager now shows your new cards.
TGT board added.
TGT cards appear in the crafting menu but can't be crafted yet. (Thanks, luckyluke193)
Rank is now being tracked for end-of-the-month rewards. (Thanks, danhakimi)
New quests are "Win 3 games with x class" (50g) and "Win 5 Tavern Brawls" (60g). (Thanks, guimontag)
If you set your computer time to Aug 24, you can open TGT packs but not retrieve cards.
Other minor fixes/additions/changes:
Fel Reaver: text changed from "discard" to "remove"; can no longer see cards discarded/removed. Its owner can see the cards in the card history on the side. (Thanks kn0ff, Whooshless)
Cards created by others are now labelled and appear in the history sidebar.
This affects: Mechanical Yeti, Tinkertown Technician, Ysera, Antonidas, Toshley, Mind Vision, Wild Mana. Does not affect: Clockwork Gnome, Mech-Bear-Cat. (Thanks, Splitzinsanity, WG95, xLyca, Flickered, culinko, jayr__).
Spells that cost more now have their true cost displayed to your opponent. thread (Thanks, TyCooper8)
Fixed: Deck positions no longer jump around. (Thanks, Drone_7 )
Fixed: Dragging My Collection button. (Thanks, Fixn)
Fixed: You can now scroll the Naxx & BRM Class Challenge lists in the mobile client. (Thanks, LouBrown)
Improved visual effects on Duplicate and Echo of Medivh. (Thanks, RedQ, Dyvn_)
New animation for ranking up. (Thanks, JosephD1014)
Android quest screen now shows the same information that the PC version does (amount of wins etc), as opposed to just quests. (Thanks, samohtxotom)
Thoughtsteal: new sound and animation. (Thanks, BloeR, Notsomebeans)
Faster Silence animation. (Thanks, Massacrul)
Crafting a minion now plays its sound effect.
Roach Boy added to the searching-for-match spinner.
Getting 12 wins in arena gets you a message from the Innkeeper. (Thanks, Digeridoodle)
Arena reward icons are now smaller.
Cursor in collection manager is different shape. (Thanks, Fikoblin)
You can now squelch opponents in Spectator Mode. (Thanks, OhYaaah)
Resurrect now requires a friendly minion to have died this game to be played. (Thanks, Adys)
The popup for the next reward card at each class level in the Quest Log is now a lot bigger. (Thanks, Mutatiion)
Card packs also have a new blue highlight. (Thanks, Mrl33tastic)
Bugs / possible bugs:
Visual bug: casual and ranked modes don't display when gold is given, but still add gold to your account. (Thanks culinko, Camplify)
Friend list bugs: "Last played" sometimes doesn't appear on friend list. (Thanks Fikoblin, Sychael) Visual bugs. (Thanks, dranreb070) If you add a recently played person as your friend, they are added to your friend list twice. (Thanks, cloudsmastersword) Wrong rank icons briefly displayed. (Thanks fastattaq, Yttriumz)
Occasional "Can't lose stars at this rank" at ranks >20. Edit: Started occurring a few days ago, unrelated to the patch. Seems to occur when you tie and have 0 stars at your rank. (Thanks, MarcDVL, Dynoglory)
Mousing over your arena key no longer shows your arena wins. (Thanks, culinko)
Enemy played spells don't show spell power bonuses. (Thanks, advanc3r)
Spectate Cards have a green border all the time. You need to move mouse to reset. (Thanks, theSurgeonOfDeath)
"Specator Mode" button is a bit offset and now partially overlaps the player's hand. (Thanks, WG95)
In some situations, probably when animations are stacked, conceding did not play the "you win" dialogue. (Thanks, bunnybacon)
Searching "The Grand Tournament" in collection manager does not show all TGT cards. (Thanks, luckyluke193)
Android: Looking at history and playing a card will result in a visual glitch where they overlap. (Thanks, yumyum36)
On high resolutions, hovering over player names creates an object off-screen. (Thanks, ultio)
Odd behavior with the collection manager search bar. (Thanks, bunnybacon)
Gnomish Experimenter doesn't show if a card gets turned into a chicken or not. (Thanks, Silver721)
Searching "new" in the Collection Manager sometimes doesn't work as expected. (Thanks, Injuredism, MartinMan2213)
Many cards listed out of order. (Thanks, vulp)