wuala doesn't start in linux

I think that pasting the session will be enough.

~> cd wuala
~/wuala> ./wuala
Using config file /home/luntain/.config/wualarc
Updating to version 65 ....java.lang.RuntimeException: java.lang.NoClassDefFoundError: com.wuala.obfuscated.rO
at com.wuala.loader.Loader.run(Loader.java:69)
at com.wuala.loader.Loader.main(Loader.java:134)
Caused by: java.lang.NoClassDefFoundError: com.wuala.obfuscated.rO
at java.lang.Class.initializeClass(libgcj.so.81)
at com.wuala.platform.Wuala.launch2(Z:33)
at java.lang.reflect.Method.invoke(libgcj.so.81)
at com.wuala.loader.starter.ReflectiveWrapper.invoke(ReflectiveWrapper.java:38)
at com.wuala.loader.starter.ApplicationWrapper.launch(ApplicationWrapper.java:19)
at com.wuala.loader.Loader.run(Loader.java:63)
...1 more
Caused by: java.lang.ClassNotFoundException: sun.reflect.generics.reflectiveObjects.NotImplementedException not found
at com.wuala.loader.starter.WualaClassLoader.findWualaClass(WualaClassLoader.java:51)
at com.wuala.loader.starter.WualaClassLoader.loadClass(WualaClassLoader.java:30)
at java.lang.ClassLoader.loadClass(libgcj.so.81)
at java.lang.Class.forName(libgcj.so.81)
at java.lang.Class.initializeClass(libgcj.so.81)
...6 more
Caused by: java.io.IOException: sun/reflect/generics/reflectiveObjects/NotImplementedException.class not found
at com.wuala.loader.loader.remote.RemoteCompilation.get(RemoteCompilation.java:38)
at com.wuala.loader.starter.WualaClassLoader.findWualaClass(WualaClassLoader.java:38)
...10 more
~/wuala>