Update: Rift 1.4 Hotfix 2

GENERAL

 * We no longer auto-add you to the World Defense channel if all 10 of your chat channel slots are taken.
 * Puresource drops from level 25-29 rift encounters for players level 35+ were one tier too low. Fixed!
 * Middle Mouse button, Mouse Button 4, and Mouse Button 3 keybinds should function again when the mouse cursor is over UI elements.

HAMMERKNELL

 * Soulrender Zilas: Fixed the movement speed of Zilas' beam.
 * Rune King Molinar: Runic Draining no longer continues to tick after hitting its target location.
 * Rune King Molinar: Dramatically reduced the raid-wide damage portion of Cursed Blows.
 * Prince Dollin: Rend Life and Terminate Life were interacting poorly with abilities that reduce incoming damage by a percentage. This has been fixed and Rend Life and Terminate Life now consistently deal the intended damage.
 * Prince Dollin: Forked Blast no longer appears to hit NPCs and pets (it never actually hit them, but the visual effect would make it look like it did).

DROWNED HALLS

 * Fixed players acquiring the Undertow achievement even though Hydriss had not been defeated.
 * The lockout timer for Drowned Halls should display properly.
 * When Hydriss dies, her loot can now be retrieved a nearby chest, fixing issues with her dying while hovering too high to reach.

PvP

 * Fixed Rifts saying they were PvP Rifts when they were really... not.
 * Noise Cancelling Coating has been added to the diminishing returns group for control abilities, and has a total stack size of 1.

QUESTS

 * Saga of the Endless: Fixed a player-reported visibility issue with Sylver Valis.
 * Moonshade: A Gathering Force: The Demiurge of Fire has been moved to a new location, just slightly down the hill from the old one.

CRAFTING

 * Enchanted Shadethorn Lumber, Tempered Orichalcum Bar, Steel-Stitched Leather, Bolt of Radiant Witchweave, and Infinite Essence now resell to merchants for less.
 * Fixed an issue with redundant quest text for Crafting Weekly Quests.

CLIENT

 * Fixed a startup crash when running on Wine/CrossOver with low video memory. If you still experience crashes when entering the world, try enabling the low quality renderer and/or playing at a lower resolution as a workaround.
 * Significantly improved memory usage in highly populated areas.

Source
http://forums.riftgame.com/official-rift-news/patch-notes/237974-rift-1-4-hotfix-2-8-00am-pdt-8-5-11-na.html