[reading]

  <?xml version="1.0"?>
  <project name="TestCase" default="build" basedir=".">
    <target name="build">
      <delete file="src.zip"/>
      <zip zipfile="src.zip">
        <fileset dir="src" defaultexcludes="no"/>
      </zip>
    </target>
  </project>

Note that I'm using the defaultexcludes attribute on <fileset>.  This works 
fine.