I have a free form web application project that runs a <java> task to compress Dojo JS source.  I stripped the build
file down to just this one target to demonstrate the issue:

<project name="test" default="build" basedir=".">
    <target name="build">
        <java jar="/tmp/custom_rhino.jar" fork="true">
            <arg value="-c"/>
            <arg path="/tmp/HtmlDragMove.js"/>

            <redirector output="/tmp/HtmlDragMove1.js"/>
        </java>
    </target>
</project>

When I run the script from inside NB with the Ant verbosity level set to debug, I get the following output for file I am
trying to compress:

Build sequence for target(s) `build' is [build]
Complete build sequence is [build, ]
build:
Executing '/usr/lib/jvm/java-6-sun-1.6.0.13/jre/bin/java' with arguments:
'-jar'
'/tmp/custom_rhino.jar'
'-c'
'/tmp/HtmlDragMove.js'
The ' characters around the executable and arguments are
not part of the command.
Output redirected to /tmp/HtmlDragMove1.js
Execute:Java13CommandLauncher: Executing '/usr/lib/jvm/java-6-sun-1.6.0.13/jre/bin/java' with arguments:
'-jar'
'/tmp/custom_rhino.jar'
'-c'
'/tmp/HtmlDragMove.js'
The ' characters around the executable and arguments are
not part of the command.
dojo.provide("swdojo.dnd.HtmlDragMove");
dojo.require("dojo.dnd.*");
dojo.declare("swdojo.dnd.HtmlDragMoveSource",dojo.dnd.HtmlDragSource,{onDragStart:function(){
var _1=new swdojo.dnd.HtmlDragMoveObject(this.dragObject,this.type);
....

It seems like the <java> task runs twice based on the output but the second time it runs, the output shows up in NB
instead of going to the file I specified.  The main problem with this is the output file, /tmp/HtmlDragMove1.js, ends up
as a zero byte file.

If I run this same build script in NB 6.5, the output is almost the same (I don't see the JavaScript output to the NB
output window) and I don't end up with a zero byte file:

Build sequence for target(s) `build' is [build]
Complete build sequence is [build, ]
build:
Executing '/usr/lib/jvm/java-6-sun-1.6.0.13/jre/bin/java' with arguments:
'-jar'
'/tmp/custom_rhino.jar'
'-c'
'/tmp/HtmlDragMove.js'
The ' characters around the executable and arguments are
not part of the command.
Output redirected to /tmp/HtmlDragMove1.js
Execute:Java13CommandLauncher: Executing '/usr/lib/jvm/java-6-sun-1.6.0.13/jre/bin/java' with arguments:
'-jar'
'/tmp/custom_rhino.jar'
'-c'
'/tmp/HtmlDragMove.js'
The ' characters around the executable and arguments are
not part of the command.
BUILD SUCCESSFUL (total time: 0 seconds)