*Update 8.1  went live on November 1, 2012

Llist of changes between 8.0 and 8.1:

Update 8.1 Notes:

Content:

• Added base British Tech Tree: medium tanks branch with FV4202 as Tier 10 and heavy tanks with FV215 as Tier 10 tank.
• Following Premium vehicles were added to in-game store: Tier 7 Soviet TD SU-122-44, Tier 7 German MT Panther M-10, Tier 6 German MT Pz IV Schmalturm
• Following maps were reworked and optimized for new render graphics:
  
  • Province
  • El-Halluf
  • Dragon Ridge
  • Abbey
• ‘Dragon Ridge’ map re-introduced to random battles
• ‘Prokhorovka’ Assault map removed
• Inscriptions on USSR tanks were reworked for better visibility and entertainment value
• Inscriptions of all nations were reworked to be readable from a distance

 Game Mechanics:

• Added ability to purchase premium rounds using credits in addition to the current gold variant (prices are based on 1 gold = 400 credits exchange rates) Read more here.
• ‘Insufficient credits’ status added to the module hint
• Added the ability for a platoon creator to exclude game modes for the platoon – this means that platoon will enter only the game modes which are selected in platoon creator's options
• Adjusted the rate at which the tank burns down for the majority of tanks (minor adjustment)
• Added Object 263 to the description of the ‘Lion of Sinai’ achievement

Technical Optimization:

• Many objects on several maps were optimized for new render system
• Optimized drawing speed of some small objects
• Fixed incorrect brightness effects (too dark or too light) on some maps
• Fixed the performance drop for several hardware configurations

 Fixes:

• Fixed rare issue which caused player be placed into game modes they previously excluded
• Fixed the situation where selecting one of the game modes to be excluded caused the player to be excluded from a non selected game mode (ex: blocking encounter actually blocked assault)
• Fixed the bug which launched the tank into the air after it drove inside a bunker
• Fixed the errors for certain objects and lighting on maps ‘Ruinberg’, ‘Widepark’, ‘El-Halluf’, ‘Airfield’ and ‘Himmelsdorf’
• Removed tank shadow from the garage when the vehicle is still in baltte
• Removed gap between tank and surface in standard garage
• Fixed mistakes in models for the following vehicles:
  
  • Pz IV Schmalturm
  • SU-122-54
  • Superpershing
  • VK 3002 DB, VK 3001(H)
• Fixed mistakes in display of camouflage patters on SU-100-M1
• Fixed incorrect display of emblems and inscriptions on following vehicles:
  • AMX 13F3AM
  • D2, SU-122-54
  • MkVII Tetrarch
  • VK3601H
  • Т110Е5
  • AMX 50 120
• Fixed the display of the damage panel for SPGs (the display in the lower left of the battle HUD) to show an actual SPG
• Fixed the display of SU-122-54 turret armoring
• Fixed the slope angle of lower armor plate of IS-7 (changed to historical)
• Fixed the slope angle of lower armor plate of IS-3 (changed to historical) as well as bottom armor
• Fixed poor visibility of the projectile when firing in sniper mode
•  Fixed rare "freeze" of the game at start of battle
•  Fixed rare "freeze" of the game when exiting to garage
• Fixed severe FPS drop, which happened 2-3 seconds after entering Sniper
• Fixed water display artifacts with enabled antialiasing
• Fixed the incorrect re-initialization of dynamic shadows after switching over to the game using Alt+Tab
• Fixed the display of grass in Sniper Mode with this option disabled
• Fixed rare incorrect interaction between water and fog
• Fixed many small interface errors of after battle statistics window
• Fixed error of replaying the base capture sound during replay pause
• Fixed the rare error with stop of replay reproduction after rewinding
• Chat messages returned to replays
• Fixed battle replay is not ending when the battle is over
• Fixed inability to resume battle recording after turning it on/off
• Fixed the incorrect work of minimap in Clan Wars battles (with Fog of War enabled)
• Fixed the impossibility to reconnect to Clan Wars battle if replays are enabled
• Fixed the memory leak upon radial menu opening
• Fixed the update of tank icons in nation tree in research menu
• Fixed the incorrect status for researched modules on vehicles that have not yet been researched
• Fixed the intersection of ammo rack blow-up icon with damage numbers
• Fixed the incorrect sound for hitting a stone surface
• Fixed the loading of battle menu where it required two presses of the Esc button
• Fixed rare bug with unavailability of mouse cursor in battle menu window
• Fixed some small errors in ‘Exterior’ menu window
• Fixed some grammar errors in German inscriptions
• Fixed the problem of suspension if account was online for more than 25 hours
• Fixed incorrect display of penetration mark after ricochet
• Fixed the impossibility of taking a screenshot with active battle chat
• Fixed the display of 3 types of shells in Garage for tanks which have only 2 types of ammunition
• Upon opening the free XP conversion window, any elite vehicle that does not have all of its modules researched due to the addition or change of the vehicle in a previous update will be unchecked by default
• Fixed emblem: added Myanmar flag, corrected description for Taiwan flag
• Clarified terms for receiving the award "Sentinel"
• Fixed hanging up of the camera when giving a command in the Radial Menu
• Fixed the missing skill training percentage when choosing a crew member

Update 8.0 release notes can be found here