The first major patch for World of Warcraft: Cataclysm is upon us. In this patch players will experience major class and talent changes, all-new user interface options, and other systems improvements setting the framework for World of Warcraft’s third expansion.

Here you'll find a host of resources, including the patch 4.0.1 notes and known issues, as well as what's changed, what's new, and everything else you need to know about patch 4.0.1.

Known Issues & Hotfixes

• Quality Assurance Known Issues:
  http://forums.wow-europe.com/thread.html?sid=1&topicId=14870319832


• Customer Service Issues and Updates:
  https://forums.wow-europe.com/thread.html?topicId=14870319974&sid=1


• Development Class Balance Concerns & Hotfixes:
  https://forums.wow-europe.com/thread.html?topicId=14870320215&pageNo=1&sid=1#6


• Warlock Pets Renamed:
  https://forums.wow-europe.com/thread.html?topicId=14870050071&sid=1


• Missing Enchantments:
  https://forums.wow-europe.com/thread.html?topicId=14870051921&pageNo=1&sid=1#4


• What A Long, Strange Trip It's Been & Master Riding:
  http://forums.wow-europe.com/thread.html?topicId=14870143073&pageNo=1&sid=1#6

General Information

• Patch Notes:
  Patch 4.0.1 Notes


• Cataclysm Streaming Launcher:
  http://forums.wow-europe.com/thread.html?topicId=14870029372&sid=1


• 4.0.0+ Patch and Installation Information:
  4.0.0+ Patch and Installation Information


• Download the Interface AddOn Kit:
  Download the WoW Interface AddOn Kit

Gameplay Information

• Class Mechanics Changes:
  11/10 4.0.1 Class Mechanics Changes


• Class and Mastery Systems Update:
  http://www.wow-europe.com/en/info/underdev/4p0/classandmastery.xml


• Changes to Glyphs:
  11/10 Upcoming Changes to Glyphs in 4.0.1


• Currency Changes:
  Cataclysm Currency Changes Explained


• Currency Conversion:
  Currency Conversion -- Justice Point Update


• Currency - Justice Point Drop Quantities:
  Cataclysm -- Justice Point Drop Quantities


• Flexible Raid Lock System:
  Flexible Raid Locks


• Gem Changes:
  Gem Changes in 4.0.1


• Guild Member Cap:
  Guild Members Capped in 4.0.1


• Guild UI Changes:
  12/10 Guild UI Changes in 4.0.1


• Item Reforging:
  http://www.wow-europe.com/cataclysm/features/reforging.html


• Stat Changes:
  12/10 Stat Changes in 4.0.1

Patch 4.0.3 and Cataclysm

• Official Cataclysm Cinematic Trailer Revealed:
  Official Cataclysm Cinematic Trailer Revealed


• Cataclysm Launching December 7:
  Cataclysm Launching December 7!


• Under Development:
  http://www.wow-europe.com/en/info/underdev/


• Mounts & Items Removed in 4.0.3:
  Mounts and Items Removed in 4.0.3