This is the data file and tools to Patch World of Warcraft from v4.1.0a to v4.2. This .zip includes the data file wow-update-base-14480.MPQ and several tools.

To use:

1\ extract all files and place everything except the MPQ in your main WoW folder

2\ place wow-update-base-14480.MPQ into the \Data\ subdir of your WoW folder

3\ run the launcher to patch.

World of Warcraft Client Patch 4.2.0a

Bug Fixes

Using an instant cast spell right after a target dies should no longer re-target the dead target's body.
Using an ability immediately after switching targets should no longer affect the previous target.
Resolved a movement error when jumping onto an object while experiencing a low frame rate.
Mac: Fixed a bug preventing shift and mouse wheel commands from registering properly.
Resolved issues that were causing client crashes near Beth'tilac in the Firelands.
Disconnecting while riding as a passenger in a vehicle should no longer cause an error upon subsequent login.
Entering a password with Japanese Hiragana selected as the keyboard type should no longer cause a crash.
Resolved an issue that was causing the client to crash under certain conditions when minimizing the game client.

Items

The tooltip color for heirloom items has been returned to gold.

Quests

A move enforcement issue has been resolved that was affecting the death knight starting area quest N Death Knight [55] Death Comes From On High.
Tarecgosa's platform during the cutscene from N [85] Alignment (Elemental Bonds legendary quest) should now be visible before she lands on it.