Patch 1.9.0 (undocumented changes)

This article lists all known undocumented changes for patch 1.9.0. All documented changes should be listed on the main article.
==General==
===Chat===
* LFG and Trade chat channels in capital cities merged by faction.
* Out-of-zone chat channels disabled.
==Classes==
===Paladin===
* Damage caused by Holy Shield causes 20% additional threat.
1.09.0 (undocumented changes)