"Speaking of build stability, I'll copy paste the same thing I mentioned on EUW about Olaf not being in 3.11 now: 

We're actually planning to pull him from this build. With the World Finals coming up, build stability is of incredibleimportance, so we're being extra careful. If this were just a regular patch we might be okay with trying out Olaf but this isn't the case.

Morello has mentioned that Live Design is happy with Olaf's overall design direction, but there are certain build considerations (bug fixes, etc) to take into account. So there we have that."

Balance Changes

Thresh

• Death Sentence ( Q ) no longer reads "On successful hit, Death Sentence's cooldown is reduced by 3 seconds. " -  It's now reverted back to what it currently is on live servers.

• 8/24 PBE Update: SGU Interactions and new PP Lee Sin Particles
• 8/23 PBE Update: Thresh Q change
• 8/22 PBE Update: Turrets with Items
• 8/20 PBE Update: Four new Summer Skins!

"Some of you have asked for additional time to snag your riot skins. We want to make sure you all have the opportunity to sort out your riot squads, so we're leaving Riot Blitzcrank and Riot Graves in the store until after we leave PAX Prime on September 3. 

Just remember that while Riot Blitzcrank will be back in action at our next convention, Riot Graves retires to the Legacy Skins Vault once we pack up the show at PAX. This is your last chance to get your hands on last year's riot skin, so don't forget! 

Hit the store between now and the end of PAX on September 3 to grab Riot Graves and Riot Blitzcrank before they're gone. "

• Arcade Hecarim, Riot Blitzcrank and Riot Graves
• Lucian Now Available
• Lucian Champion Spotlight
• Dunkmaster Darius
• Pool Party Skins

"Summoners,

On 7/31/13 [ date obv wrong ], starting at 01:30 AM PST, ranked queues will be disabled in preparation for patch 3.10a. At 03:00 AM PST, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours."

"On 21/08/13, starting at 1:30, ranked queues will be disabled in preparation for patch 3.10a. At 3:00, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours."

"Ranked queues have been disabled in preparation for patch 3.10a. At 01:00 UTC, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours.
--
Update:

00:45 UTC - The maintenance has been delayed by an hour. Servers will be shut down at 02:00 UTC."

"Hey Summoners! 

With our focus on stability for patches leading up to the World Finals, we’ve decided to split our next update into a few parts in order to mitigate risk. As such, this patch is titled 3.10a due to the nature of its deploy (as it contains only balance and design changes)."

"Learn to unleash a barrage of bullets and send opponents to the grave in the Lucian Champion Spotlight. 

A highly-mobile ranged damage dealer, Lucian shines when blasting enemies with Piercing Light and quickly repositioning himself with Relentless Pursuit to unleash more pain or retreat from counterattacks and jungle ganks. By tagging enemies with Ardent Blaze and activating The Culling, Lucian gains the speed boost needed to chase down opponents, unload massive damage and secure kills. And since Lightslinger enables double on-hit procs of life steal, red buff and more, Lucian can overcome opponents in duels and in-lane trades with strategic use of his abilities. 

Put evil in its place – 6 feet under – as Lucian with sample masteries, tactics and more in this Champion Spotlight."

"Summer's come to Valoran, and Ziggs, duke of demolition, is throwing a blast of a pool party. Step one: blow up the inflatable pool toys. Hopefully he won't misunderstand that one. Step two: invite friends! Leona's here soaking up all the rays, no sunscreen required. Renekton's on lifeguard duty, but he seems more worried about random explosions than anyone drowning. In the shallow end of the pool, Lee Sin happily studies the motion of the water with his hands while Graves, a sly grin curling across his lips, aims his watergun at the uncharacteristically oblivious monk. Leave it to Ziggs to create an explosive situation, this could get veryinteresting! 

Welcome to Summer-ers Rift! Your invitation to the coolest dive in Valoran is coming soon."

"As a measure to make your accounts safer, within the next 24 hours we’ll require players with accounts in North America to change their passwords to stronger ones that are much harder to guess. At such time, you’ll be automatically prompted to change your password when you attempt to log in to the game. If you’d prefer, please click here to change your password now."

"Summoners,

Starting at 20/08/2013 11:30pm UTC, ranked queues will be disabled in preparation for a server maintenance at 21/08/2013 1:00am UTC, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours."

"Summoners,

On 20/8/2013, starting at 09:30pm UTC, ranked queues will be disabled in preparation for a server maintenance. At 11:00pm UTC, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours."

"Summoners,

On 8/19/2013, starting at 10:30pm PDT, ranked queues will be disabled in preparation for a server maintenance. At 12:00am PDT, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours."

The Lightbringer and Hextech Sweeper Circles

Just as Manwolfaxeboss noted yesterday, The Lightbringer and Hextech Sweeper now have faint circles, just like Oracle's Elixir, to denote the range they reveal invisible traps in.

• 8/15 PBE Update - Arcade Hec and Riot Blitz Splashes, New Summoner Icons
• 8/14 PBE Update - Arcade Hec VO and Riot Blitz sounds.
• 8/13 PBE Update - Forecast Janna VO, Teamfight UI, and much more.
• 8/12 PBE Update - Forecast Janna, Arcade Hecarim, Riot Blitz

"We're testing a new UI mode for Spectator mode and would love your feedback. We're calling this mode the Teamfight UI. The overall goal of this mode is to provide a great viewing experience during large team fights."