Cant log in(/auto log out) with a particular Character

[Etherius]

As the Topic suggests, I cant log in with a particular Character and I don't why exact, but this showed up after I picked a Mushroom (I think it was a Lavender Blewit) in the wilderness of the New World of Roanoke. Strangely I can log in and play with my other Characters.

After I click play, it logs me in, loads the UI for a split second und then the Game logs me out and if I try to relog it says "Already logged in" for a few minutes. I started to delete the Java-Cache und using the normal Starter, closed all my background services but still the same. I tried to log in on an another Computer, no change. After I started to mess around with Java some further it gave me following error massage:

java.lang.RuntimeException: java.lang.NullPointerException
at jogamp.common.awt.AWTEDTExecutor.invoke(AWTEDTExecutor.java:58)
at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:103)
at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:205)
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:172)
at javax.media.opengl.Threading.invoke(Threading.java:191)
at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:449)
at haven.HavenPanel.uglyjoglhack(HavenPanel.java:391)
at haven.HavenPanel.run(HavenPanel.java:423)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at haven.LoginScreen$Tokenbox.draw(LoginScreen.java:221)
at haven.Widget.draw(Widget.java:509)
at haven.Widget.draw(Widget.java:514)
at haven.LoginScreen.draw(LoginScreen.java:324)
at haven.Widget.draw(Widget.java:509)
at haven.Widget.draw(Widget.java:514)
at haven.RootWidget.draw(RootWidget.java:80)
at haven.UI.draw(UI.java:147)
at haven.HavenPanel.redraw(HavenPanel.java:279)
at haven.HavenPanel$1.display(HavenPanel.java:92)
at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:373)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:358)
at javax.media.opengl.awt.GLCanvas$7.run(GLCanvas.java:983)
at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:655)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:594)
at javax.media.opengl.awt.GLCanvas$8.run(GLCanvas.java:996)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

I think a reset of the Inventory might work, but i actually have no clue what to do.
P.S.: sry for my bad english :/

[MagicManICT]

Which client are you using? Issues with 3rd party mods should be taken up with the programmer. (This is typically seen with Ender's.)

Otherwise, thanks for the report. It's not an issue I'm familiar with and don't want to say what may or may not be the cause.

[Etherius]

I tried it with both Clients. With Ender and with the Original, still the same result.

Edit1: Java 6 fixed the Problem.