New launcher releases do not save progress in worlds

Please attach the complete output of the development console.

Launcher 1.0 (through bootstrap 4) started on windows...
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_17'
System.getProperty('java.vendor') == 'Oracle Corporation'
Going to log in with legacy stored username & password...
Loaded 2 profile(s); selected '(Default)'
Trying to log in...
Logging in with username & password
Delta time to compare resources: 588 ms 
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Logged in successfully
Getting syncinfo for selected version
Queueing library & version downloads
Download job 'Version & Libraries' started (8 threads, 1 files)
Finished downloading C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6.jar for job 'Version & Libraries': Used own copy as it matched etag
Job 'Version & Libraries' finished successfully
Launching game
Unpacking natives to C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6-natives-23648813007869
Launching in C:\Users\PC_USER\AppData\Roaming\.minecraft
Running C:\Program Files\Java\jre7\bin\javaw.exe -Xmx1G -Djava.library.path=C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6-natives-23648813007869 -cp C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6.jar net.minecraft.client.main.Main --username AlexDeGamer --session 5f51169c14709c5a3c0fa4839c730ebcc07be668 --version 1.6 --gameDir C:\Users\PC_USER\AppData\Roaming\.minecraft --assetsDir C:\Users\PC_USER\AppData\Roaming\.minecraft\assets
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- (We'll do this automatically later ;D) ----
Client> 2013-06-25 16:10:27 [CLIENT] [INFO] Setting user: AlexDeGamer
Client> 2013-06-25 16:10:27 [CLIENT] [INFO] (Session ID is 5f51169c14709c5a3c0fa4839c730ebcc07be668)
Client> 2013-06-25 16:10:28 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> 2013-06-25 16:10:28 [CLIENT] [INFO] Reloading ResourceManager: Default
Client> 
Client> Starting up SoundSystem...
Client> Initializing LWJGL OpenAL
Client>     (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client> 
Client> 2013-06-25 16:10:33 [SERVER] [INFO] Starting integrated minecraft server version 1.6
Client> 2013-06-25 16:10:33 [SERVER] [INFO] Generating keypair
Client> 2013-06-25 16:10:33 [SERVER] [INFO] Preparing start region for level 0
Client> loading single player
Client> 2013-06-25 16:10:34 [SERVER] [INFO] AlexDeGamer[/127.0.0.1:0] logged in with entity id 135 at (186.64281988540864, 9.0, -55.81322502509825)
Client> 2013-06-25 16:10:34 [SERVER] [INFO] AlexDeGamer joined the game
Client> Setting up custom skins
Client> 2013-06-25 16:10:34 [SERVER] [INFO] Saving and pausing game...
Client> 2013-06-25 16:10:34 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Overworld
Client> 2013-06-25 16:10:34 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Nether
Client> 2013-06-25 16:10:34 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/The End
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving and pausing game...
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Overworld
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Nether
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/The End
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Stopping server
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving players
Client> 2013-06-25 16:10:36 [SERVER] [INFO] AlexDeGamer left the game
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving worlds
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Overworld
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/Nether
Client> 2013-06-25 16:10:36 [SERVER] [INFO] Saving chunks for level 'Alex's Survival World'/The End
Client> 2013-06-25 16:10:37 [CLIENT] [INFO] Stopping!
Client> 
Client> SoundSystem shutting down...
Client>     Author: Paul Lamb, www.paulscode.com
Client> 
Game ended with no troubles detected (exit code 0)
Deleting C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6-natives-23648813007869
Couldn't delete C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6-natives-23648813007869 - scheduling for deletion upon exit

Everything looks normal.
It doesn't download anything:

Finished downloading C:\Users\PC_USER\AppData\Roaming\.minecraft\versions\1.6\1.6.jar for job 'Version & Libraries': Used own copy as it matched etag

Does MCL-416 describe your issue ?

Not really. I tried to fix it but nothing worked. Do you need me to send more info? Basically the saves I have made (including severs that I've saved to the multiplayer list) have all been restarted from when I first installed the first version of the new launcher. I've been able to counteract this somehow a couple of times, but it escapes me as to how I do it again. Also, recently I downloaded some new maps off PlanetMinecraft to try out, and instead of picking up where I left off, they completely restarted. I think it does have to do with old directories, but you're going to have to explain it in basic talk because I don't really understand code... thanks by the way!

Aha. Got it.
The world saves revert to an older saved state.
Sounds more like a Minecraft issue than a Launcher issue.

Thanks! Create a new issue, then?

No, this ticket is still unresolved, but I'm out of ideas.

Kumasasa, I figured out what it is! It must have something to do with how Minecraft uses directories and obtains information from saves! It must be either using an old directory or obtaining the wrong save files! I was able to scan my worlds with a mapping program (Cartograph G), and found that everything is just like how it was when I last left it, even though when I play it things are missing from a few months ago. I hope this info helps and that we can somehow get this fixed!

must be either using an old directory or obtaining the wrong save files

What happens if you play that world: Can you see that the last access date of the files in {{C:\Users\PC_USER\AppData\Roaming\.minecraft\saves\Alex's Survival World}} do change ? In what world / directory do you find your progress with cartograph ?
Do you have two worlds with the same name ?
Or did you stumble over MC-17830 ?

Yes, every time I play, the time stamp does update. In cartograph, I use C:\Users\PC_USER\AppData\Roaming\.minecraft\saves\Alex's Survival World, the same location where my world is, to map. I do not have two worlds with the same name, and the bug you listed has happened to me before, but did not effect the state of my world.

But from where in the world (pun intended) should Minecraft take the old data ?
If there is only one directory where Cartograph reads correct from, but not Minecraft ?!?
No more ideas.

Duplicate of MC-409