I loaded up a new world to see the new game features, but when I entered the water and was about to go under the surface, the game froze and had to be exited. When I loaded the same game up again, it saved under the water and trying to return to the surface caused the same crash.
Here is the complete output under "Development Console", taken right after the game crashes:
Launcher 1.2.1 (through bootstrap 5) started on windows... Current time is Aug 8, 2013 6:56:19 PM System.getProperty('os.name') == 'Windows 8' System.getProperty('os.version') == '6.2' System.getProperty('os.arch') == 'amd64' System.getProperty('java.version') == '1.7.0_10' System.getProperty('java.vendor') == 'Oracle Corporation' System.getProperty('sun.arch.data.model') == '64' Loaded 1 profile(s); selected 'Bellarmine' Refreshing auth... Logging in with access token Delta time to compare resources: 2287 ms Download job 'Resources' skipped as there are no files to download Job 'Resources' finished successfully Getting syncinfo for selected version Queueing library & version downloads Download job 'Version & Libraries' started (8 threads, 19 files) Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Used own copy as it matched etag Finished downloading C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2.jar for job 'Version & Libraries': Used own copy as it matched etag Job 'Version & Libraries' finished successfully Launching game Looking for old natives to clean up... Unpacking natives to C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-281581094041754 Launching in C:\Users\AniMajor\AppData\Roaming\.minecraft Running C:\Program Files\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Djava.library.path=C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-281581094041754 -cp C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\AniMajor\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2.jar net.minecraft.client.main.Main --username Bellarmine --session token:7b509451c1e44df7ba391b6846cbc313:d1f1d932fc684665aa21c55ff4db129e --version 1.6.2 --gameDir C:\Users\AniMajor\AppData\Roaming\.minecraft --assetsDir C:\Users\AniMajor\AppData\Roaming\.minecraft\assets Client> 2013-08-08 18:56:48 [CLIENT] [INFO] Setting user: Bellarmine Client> 2013-08-08 18:56:48 [CLIENT] [INFO] (Session ID is token:7b509451c1e44df7ba391b6846cbc313:d1f1d932fc684665aa21c55ff4db129e) Client> 2013-08-08 18:56:48 [CLIENT] [INFO] LWJGL Version: 2.9.0 Client> 2013-08-08 18:56:48 [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> 2013-08-08 18:57:03 [SERVER] [INFO] Starting integrated minecraft server version 1.6.2 Client> 2013-08-08 18:57:03 [SERVER] [INFO] Generating keypair Client> 2013-08-08 18:57:03 [SERVER] [INFO] Preparing start region for level 0 Client> loading single player Client> 2013-08-08 18:57:04 [SERVER] [INFO] Bellarmine[/127.0.0.1:0] logged in with entity id 196 at (200.41712644109185, 67.0, 244.1316983102414) Client> 2013-08-08 18:57:04 [SERVER] [INFO] Bellarmine joined the game Client> Setting up custom skins Client> 2013-08-08 18:57:17 [SERVER] [INFO] Saving and pausing game... Client> 2013-08-08 18:57:17 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/Overworld Client> 2013-08-08 18:57:18 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/Nether Client> 2013-08-08 18:57:18 [SERVER] [INFO] Saving chunks for level 'Copy of Mushrooms'/The End