This is a listing of some of the known issues for World of Warcraft Patch 4.0.0.
This list is not complete, and will not include all issues.
The issues listed here are frequently reported issues that will be addressed at a later date via a client patch.
General Issues
Quitting a guild will cause a client crash for all other online guild members
Characters can become visually stuck in an animation pose
Sending a whisper to players from different servers will show the wrong name in the chat logs
You are unable to see the corpses of players from other servers inside of an instance or battleground
You are unable to party chat with players from other servers inside instances of battlegrounds
Mounts (both flying and ground) cannot be used in several parts of the world.
Some trainers are not functioning properly.
Robes do not have durability.
Player portraits are incorrectly lit
Trainers are not displaying portraits
Random battleground queues do not work for players below level 80
Pet health is not being correctly restored after dismounting
Launching your client with your sound card disabled may assert your client
New battleground level brackets are not yet implemented
User Interface
Modifying guild news filters that do not apply to current news items causes the news items to swap positions in the list
Player names show up as “Unknown” in guild news if they are offline
There is a LUA error when scrolling through bank tab permissions with over 5 bank tabs
The 7th bank tab cost is incorrect
Filtering a profession prevents you from seeing the bottom recipe
Combat
Rank 2 of Killing Streak is triggering the effect of rank 1
Some priest talents can be talented into before fully talenting into their prerequisites.
Some Hunter talents can be talented into before fully talenting into their prerequisites.
Conflagrate is doing less damage than it should be
Strand of the Ancients is not working correctly for the attacking or defending teams.
Players are unable to get the Veteran buff when joining a Tol Barad battle after it has started.
The spell effect visuals for Healing Rain and Earthquake look awkward when cast on a staircase or a steep incline.
Dreamstate is not correctly benefiting Innervate
Demon Soul removes Metamorphosis
Entangling Roots spell visual is persisting in the ground after it wears off of a target
Burning embers is not functioning correctly
Rank 2 of Jinx: Curse of the Elements is drastically reducing damage taken by the target
Glyph of Renew is reducing healing output
Glyph of Holy Nova is not working
Runic Corruption can cause the visual cooldown of runes to become incorrect
Glyph of Spirit Tap does not work
Spiritual Focus only increases hit rating for spells, not melee attacks
The healing value from Devour Magic by a felhunter is not correct
Several periodic abilities are not benefiting from haste
Glyph of Shadowburn is not functioning
Rank 1 of Improved Tracking has a “NNF” tag
The final heal of Lifebloom does not benefit from Gift of Nature
Drain Life is not restoring the correct amount of health
Archangel Wings are incorrectly placed on some character models
Rank 1 of Impending Doom causes Bane of Doom to fall off early
Psychic Scream is only causing one target to flee
Attack is not placed on the warlock pet bars
Thunderstruck is not stacking its buff and is returning an error message
The glyph of Lifebloom critical strike chance increase is not working
The spell effect for Solar Beam is not consistent with its radius of effect
Anaimiss the Hive Queen and Harakiss the Infestor do not scale down properly when tamed
Owl’s Focus is not functioning
Culling the Herd is not proccing
Ritual of Refreshment is not functioning
Shaman totems cannot be recalled
Raids and Dungeons
Algalon’s platform is no longer transparent
Dynamically changing the difficulty in the Halion encounter will break the Twilight Orbs
Some trash pulls in Icecrown citadel are under the world
Several raid and dungeon bosses are despawning immediately when dying
Several bosses are not correctly rewarding Justice Points when killed
Harvested Soul does not show up on the Lich King’s buff bar
Tradeskills
Several tradeskill items are incorrectly requiring some specialized professions to learn
Some leatherworking recipes disappear from the trainer window after you close the training window
Fishing is unlearned when you log out
Environment
Players may suddenly die while running around Thunder Bluff
Bug Fixes
UI windows from interacting with NPCs should correctly close when moving away from the NPC
Insect Swarm should be trainable and usable now
The Mage talent cauterize can cause players to die in a duel
It is possible to mark yourself At War with your guild in the reputation window.
Floating Combat Text is not functioning.
Bane of Doom does not summon a Demon Guardian.
Heart of the Phoenix does not revive a hunter’s pet after it dies.
Ritual of Summoning does not actually create a Summoning Stone.
The client may lock up after finishing an Alterac Valley or Isle of Conquest game.
Players are unable to have more than 40 honor at once.
Experience gained from completing Battleground objectives is very low.
Several cloaks are displayed incorrectly on draenei females.
Removing a member from an Arena team will crash your client.
First Aid recipes are not showing up in the Spellbook once learned.
Cited from Blue:
World of Warcraft - English (NA) Forums -> PTR Known Issues List (9/18/2010)