jME/build.xml line 41 replace:
<target name="dist-core" depends="compile" description="generate jme jar file">
<jar jarfile="${jars}/jme.jar" basedir="${class}" update="no" compress="false" includes="/com/jme//.class, /com/jme//.tga" />
</target>
by:
<target name="dist-core" depends="compile" description="generate jme jar file">
<jar jarfile="${jars}/jme.jar" basedir="${class}" update="no" compress="false" includes="/com/jme//.class, /com/jme//.tga,
/com/jme//.png, /com/jme//.glf" />
</target>
This way png and glf files are added the jme.jar.
So neither Default.glf or DefaultLookAndFeel.png are missing and the widget example will work.
I can definately add this to the build.xml. But it should be known we are working to focus on a single "official" GUI. And Widget it not winning the votes, so it will quite possibly be completely removed. A little warning.
Done.