AIR 1.5, timer and html update

Question

In our HTML AIR App., we developed some code to maintain a
countdown timer that updates itself every second. An html element
is updated within a span area (<span
id="timer-display"></span>).
As of AIR 1.5, the code is not updating the html, yet the
counter continues to decrement. I've included code snippits below.
Any ideas what might have been updated? The setInterval is still
executing the updateTimerDisplay() function, but the
"div_timer_display.innerHTML" being set is not changing the
display.
*** code within exam start ***
if (start_exam_counter == 1){
updateTimerDisplay();
intervalID_TimerDisplay = setInterval(function(){
updateTimerDisplay();
}, 1000);
function updateTimerDisplay(){
var div_timer_display =
document.getElementById("timer-display");
div_timer_display.innerHTML =
formatTimeDisplay(convertSecondsToHoursObject(timer_seconds_allowed--));
if (timer_seconds_allowed < 0) {
clearInterval(intervalID_TimerDisplay);
handleTimeIsUp();
}

Answer 1

It runs fine before, so I don't know if this a bug or a
change in the way soemthing, such as ".innerHTML" is
handled.