World of Warcraft: Patch 2.1.3 released

Blizzard released patch version 2.1.3 on US and Europe Realms.
The following fixes were applied.

General
- Read in-game mail will now be kept for thirty days instead of three.
- The Warlock spell Incinerate has had the performance of its graphical
spell effect improved.
- The "Show Launcher" option has changed so that it now defaults to
"On". Players will now see the launcher when running WoW by default.

User Interface
- Improved the performance of conditional macros, slightly increasing
the framerate.
- Fixed a crash triggered by many unit frame AddOns.

Bug Fixes
- Fixed an issue with the movement of Archimonde's Doomfire.
- Fixed the wand missile art on most Shadow based wands to show the
correct graphical effect.
- Infinity Blades will now despawn properly when the encounter with
Kael'thas resets after a wipe.
- Gan'arg Underlings and Felhound Defenders are now properly classified
as demons.

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