The solution:
Capture the page upon return with the following:
var sysApplication = Sys.WebForms.PageRequestManager.getInstance();
sysApplication.add_initializeRequest(beginRequest);
sysApplication.add_endRequest(endRequest);
function beginRequest() {
// document.getElementById("divMessage").style.display = "inline";
}
function endRequest() {
setWizardProgress();
}