While the changelog doesn't go into much detail on what exactly the patch changes in Obsidian Entertainment's post-apocalyptic RPG, it does offer a good long list of areas which are affected by it. Highlights include fixes for saved game corruption and dozens of quests, plus hopefully an end to companions being lost in the Mojave wasteland.

Top fixes:

• Companions now show up as waypoints on the map
• Companions will always fast travel with you, unless told to wait or sent away
• Fix: DLC error/save corruption
• Fix: Entering the strip after Debt Collector causes crash and autosave corruption
• Fix: Using Mojave Express dropbox can cause DLC warnings
• Crafting menu now filters valid (bright) recipes to the top of the list
• Weathered pistol no longer glitches when applying mods

In addition, this patch addresses issues with the following areas:

• Pip-Boy Interface
• Pre-Order DLC Items
• Reputation System
• Radio Stations
• Companion fixes
• Companion Quests
• Repair Menu
• Caravan
• Weapons and Weapon Mods
• Hardcore Mode
• Perks
• Skills
• Crafting Recipes
• Crafting Menu
• Mojave Express
• Chems/Addiction
• Doctors
• Vendors

And fixes for the following quests:

• Ain't That a Kick in the Head
• By a Campfire on The Trail
• They Went That-a-Way
• My Kind of Town
• Boulder City Showdown
• Ring a Ding Ding!
• King's Gambit
• For The Republic, Part 2
• Render Unto Caesar
• Et Tumor, Brute?
• The House Always Wins
• Wild Card
• Beyond the Beef
• GI Blues
• How Little We Know
• Oh My Papa
• Still In The Dark
• You'll Know It When It Happens
• Arizona Killer
• Eureka!
• Veni, Vidi, Vici
• All or Nothing
• No Gods, No Masters
• Birds of a Feather
• I Put A Spell On you
• Come Fly With Me
• That Lucky Old Sun
• Don't Make a Beggar of Me
• The White Wash
• Ghost Town Gunfight
• Restoring Hope
• Bleed Me Dry
• Aba Daba Honeymoon
• Tend To Your Business
• Wang Dang Atomic Tango
• Flags of Our Foul-Ups
• Debt Collector
• Talent Pool
• Left My Heart
• Someone To Watch Over Me
• Hard Luck Blues