Offline game doesn't start

Whenever I start an offline Minecraft session, it aborts the launch. For 3 minutes it tries to start the game, then after that it comes out like this:
EDIT:
Here's the actual Dev. console text:

Development console

Launcher 1.0.10 (through bootstrap 4) started on windows...
Current time is Jul 18, 2013 9:12:11 PM
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'x86'
System.getProperty('java.version') == '1.7.0_07'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '32'
Loaded 2 profile(s); selected '(Default)'
Couldn't get server status
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
	at com.google.gson.Gson.fromJson(Gson.java:815)
	at com.google.gson.Gson.fromJson(Gson.java:768)
	at com.google.gson.Gson.fromJson(Gson.java:717)
	at net.minecraft.launcher.ui.sidebar.StatusPanelForm$1.run(StatusPanelForm.java:57)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
	at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:1)
	at com.google.gson.Gson.fromJson(Gson.java:803)
	... 9 more

Unexpected exception refreshing version list
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176)
	at com.google.gson.Gson.fromJson(Gson.java:803)
	at com.google.gson.Gson.fromJson(Gson.java:768)
	at com.google.gson.Gson.fromJson(Gson.java:717)
	at com.google.gson.Gson.fromJson(Gson.java:689)
	at net.minecraft.launcher.updater.VersionList.refreshVersions(VersionList.java:77)
	at net.minecraft.launcher.updater.VersionManager.refreshVersions(VersionManager.java:48)
	at net.minecraft.launcher.Launcher$2.run(Launcher.java:166)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1
	at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:374)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:165)
	... 13 more

Trying to log in...
Logging in with access token
Logged in successfully
Invalidating accessToken with server...
Trying to log in...
Logging in with username & password
Logged in successfully
Getting syncinfo for selected version
Couldn't go online
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at net.minecraft.launcher.GameLauncher.playGame(GameLauncher.java:96)
	at net.minecraft.launcher.ui.sidebar.login.NotLoggedInForm$1.run(NotLoggedInForm.java:174)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

Going to play offline as 'brub46'...
Delta time to compare resources: 16964 ms 
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Launching game
Aborting launch; version is null?