Patch 5.4.2 (undocumented changes)

This article lists all undocumented changes for patch 5.4.2. All documented changes should be listed on the main article.
==General==
*Collector's Edition: Treasure Goblin added, rewarded by obtaining the Treasure Goblin's Pack.
==Classes==
===Hunter===
*Dismiss Pet is now disabled after the pre-match preparatory period in Arena, due to hunters using it "to bypass cooldowns on certain pet abilities."http://us.battle.net/wow/en/forum/topic/10859655954?page=6#111 To compensate for the change, Revive Pet's cast time will be reduced to 2 seconds.http://us.battle.net/wow/en/forum/topic/10859655954?page=14#276
==Raids, Dungeons, and Scenarios==
The Karazhan Restoration is an unknown phase used for Karazhan. This also results for the Karazhan map to have an update, which caused the cobwebs, skeletons, and chairs to be removed. The name was later changed to Medivh's Big Birthday Bash, and the cobwebs, skeletons, and chairs were also added back in, but the instance remains slightly modified. The phase was renamed again to Karazhan 2: Eclectic Boogaloo. The phase was renamed for the last time to Medivh Presents Chessmaster: Illustrious Edition. Dave Maldonado later explained that he was experimenting with Karazhan with the intention of using it for an event quest chain, but met without success.
==User Interface== 
*Fixed a bug caused by coding added for the in-game Store in 5.4.1. Addons should no longer throw "IsDisabledByParentalControls()" errors.
*Guild members logging in or out now also display their realm name in the chat window. 
*There is now a Shop button in the Game Menu. 
==Items==
*Treasure Goblin's Pack added, rewarded by the Diablo III: Reaper of Souls Collector's Edition.
*Bipsi's Bobbing Berg added, available for purchase by mages only from Nat Pagle at Anglers Wharf.
*Iron Skyreaver added.
*Buccaneer's Vest has had its appearance adjusted.
==References==
5.4.2 (undocumented changes)