The problem is partly solved by replacing <a4j:commandButton..> with <h:commandButton..> but in that case <rich:hotKey..> is not working fine.
Note that in my 'cust-step1.xhtml' and 'cust-step2.xhtml' there are buttons to navigate forms inside the wizard. The most strange thing is that when I replace the
<a4j:commandButton> with <h:commandButton> the application is running fine and both the forms in the wizard are perfectly rendered in IE8 but the hot Keys are not working here. For my previously added codes which I mentioned running fine on Chrome and Firefox hot keys were also working fine. But now after changing <a4j:commandButton..> to <h:commandButton..> the application is running propery in all browsers IE8/Chrome/Firefox with no hot key functionality in any of them When hot key is pressed the form just gets refreshed without performing the desired functionality.
Similar type of problem and discussions are found here --> http://forum.primefaces.org/viewtopic.php?f=3&t=1962
I think this is a bug of richface i.e <a4j:commandButton..> which needs to be fixed...................
Waiting for viewers response......