Progressmeter with attribute 'visible=false' give JS error, page rendering is stopped with ajax 'Processing'.
The same bug if trying set 'progressMeter.setVisible(false);' in 'doAfterCompose' method.
JS console error: "Uncaught TypeError: Cannot read property 'animate' of undefined".

Sample:
http://zkfiddle.org/sample/1mbeog2/1-Progressmeter-7-0-3-with-visible-false-give-JS-error

<zk>
<window border="normal" title="Progressmeter in 7.0.3 with 'visible=false' give JS error, page rendering is stopped" >
7.0.3: error JS console: "Uncaught TypeError: Cannot read property 'animate' of undefined"
7.0.2: works fine
<progressmeter id="progressMeter" visible="false" />

</window>
</zk>