The new launcher does not ever load the Minecraft game to play.
Downloaded the new launcher today with no issues at the Mojang.com, Minecraft 1.6 pre-release. However when you click "play" the minecraft game never loads. In case it was a corrupt download I removed it and reinstalled with the same result. The following is a copy of what is shown in the development console, which is as far as it gets. No game screen, worlds, or anything else seen.
Launcher 1.0.4 (through bootstrap 4) started on windows... System.getProperty('os.name') == 'Windows 7' System.getProperty('os.version') == '6.1' System.getProperty('os.arch') == 'x86' System.getProperty('java.version') == '1.6.0_22' System.getProperty('java.vendor') == 'Sun Microsystems Inc.' Loaded 2 profile(s); selected '(Default)' Trying to log in... Logging in with access token Logged in successfully Delta time to compare resources: 725 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, 1 files) Finished downloading C:\Users\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1.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\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3619193524906 Launching in C:\Users\G S Nichols\AppData\Roaming\.minecraft Running C:\Program Files (x86)\Java\jre6\bin\javaw.exe -Xmx1G -Djava.library.path=C:\Users\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3619193524906 -cp C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1.jar net.minecraft.client.main.Main --username IronSkelly --session token:83961a3f8c7048f98deff7b000d475e0:3d56e986dfa7453495548b91f95d9403 --version 1.6.1 --gameDir C:\Users\G S Nichols\AppData\Roaming\.minecraft --assetsDir C:\Users\G S Nichols\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> 2013-06-30 16:31:54 [CLIENT] [INFO] Setting user: IronSkelly Client> 2013-06-30 16:31:54 [CLIENT] [INFO] (Session ID is token:83961a3f8c7048f98deff7b000d475e0:3d56e986dfa7453495548b91f95d9403) Client> Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang3/Validate Client> at oq.<init>(SourceFile:31) Client> at nf.a(SourceFile:237) Client> at nf.<clinit>(SourceFile:26) Client> at zk.<clinit>(SourceFile:80) Client> at xx.<clinit>(SourceFile:133) Client> at aqs.<clinit>(SourceFile:362) Client> at kx.a(SourceFile:122) Client> at kx.<clinit>(SourceFile:55) Client> at atn.<init>(SourceFile:203) Client> at net.minecraft.client.main.Main.main(SourceFile:83) Client> Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.Validate Client> at java.net.URLClassLoader$1.run(Unknown Source) Client> at java.security.AccessController.doPrivileged(Native Method) Client> at java.net.URLClassLoader.findClass(Unknown Source) Client> at java.lang.ClassLoader.loadClass(Unknown Source) Client> at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) Client> at java.lang.ClassLoader.loadClass(Unknown Source) Client> ... 10 more Game ended with bad state (exit code 1) Deleting C:\Users\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3619193524906 Couldn't delete C:\Users\G S Nichols\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3619193524906 - scheduling for deletion upon exit