I slved this problem with closining scene viewer (scene composer). Just undock its window and close it. When you need just open scene viewer in separate window.
Also, I organized Palettes and Properties windows into one frame. Properties panel caused freezing too.
@Momoko_Fan: This is a racing condition, anything could cause this. Probably the windowing system of NetBeans got faster 
@mifth: When you close the sceneviewer there is no opengl thread to block against so theres no deadlocks but all methods are executed on the thread they are called on, which is bound to produce problems (processes writing and reading to the file at the same time etc.)
Well when i need a scene viewer i switch it on in a separate window. The only strange thing i noticed with my assets when i Clean and Build a project:
Log:
Created dir: /home/mifth/jMonkeyProjects/BasicGame/dist
Copying 1 file to /home/mifth/jMonkeyProjects/BasicGame/build
Not copying library /home/mifth/jMonkeyProjects/BasicGame/build/assets.jar/MatDefs , it can’t be read.
Copy libraries to /home/mifth/jMonkeyProjects/BasicGame/dist/lib.
Building jar: /home/mifth/jMonkeyProjects/BasicGame/dist/MyGame.jar
To run this application from the command line without Ant, try:
java -jar “/home/mifth/jMonkeyProjects/BasicGame/dist/MyGame.jar”
jar:
BUILD SUCCESSFUL (total time: 4 seconds)
… okay, do whatever you want, you dont seem to care xD
This freezing make jMP practicaly unusable for me ;(
Okay… Just try to keep the SceneViewer open when you do anything on models… The only thing that might work is converting models via right-click but be sure to wait before and after so all read/write operations have been done. Building should also be no problem if you follow the same rule.
Everything you say from 2:25 on is unsupported, I don’t guarantee any of that will work properly with the SceneViewer closed.
oh, i get you. so I should use the Scene viewer to be opened within a session.
I can rerecord the video with your suggestions. Should I?
Yes, as I said, everything thats got to do with the scene and files will just happen on some thread now… It will work most of the time but its unpredictable when it could go wrong and just corrupt your files and or data in it. Anyway don’t bother about rerecoding, we’ll have this bug fixed soon.
I deleted all videos as after last night update I even can’t open JMP! Scene Viewer crash JMP again. 
I cant do anything… it crashes on opening.
Uploaded with ImageShack.us
But for those who didn’t update to the last nightly build:
http://www.youtube.com/watch?v=xX0kWv1hFvs&feature=channel_video_title
I get the exact same thing.
jMP is spamming with hundreds and hundreds of those. I’ve continuously held ESC for over 10 mins without effect. There’s still a pile of those. I think it might be the same window coming back over and over…
And fyi, I do believe the GTX 480 supports OpenGL 2.0 
Nice Thanks
I’m guessing it’s the SceneViewer that needs to be updated to reflect the new changes to the lwjgl canvas?
A fix would be most appreciated!
I committed a closeable SceneViewer now. The changes in the canvas should have already affected stability… Tomorrow you can officially close the SceneViewer
Hm, seems like @Momoko_Fan has to rework the canvas a bit still, I have problems starting jMP properly now…
normen said:
Hm, seems like @Momoko_Fan has to rework the canvas a bit still, I have problems starting jMP properly now..
Yah , me too ... It's spam with a xxxxx of dialogs.
Wish that this bug is fixed soon...
No, I mean I have problems starting it at all even when changing the code xD I know that the current nightly of the SDK doesn’t work.
Hi, Normen. I found new freeze. I just moveed scene viewer to the right frame and now JMP freezes on a start. Here is a screen. It freezes when I open JMP.
Here is my screenshot:
Uploaded with ImageShack.us
A log would be more helpful than a screen.