Actionscript 3 :: Flash Authoring Environment Different Test Movie Behavior?

I add everything dynamically via actionscript.In the Flash authoring environment, when I test the movie, sometimes all of the movieclips on stage disappear and all I see is the color of the Stage.The strange thing is that I can still rollover/rollout (I added trace statements to my rollover/rollout handlers).

I'm also tracing out the 'visible' and the 'alpha' property and visible=true and alpha=1.0 !On thing that I am seeing is sometimes the rollover/rollout methods get called multiple times in quick succession. I.e. the method invocation order is rollover, rollout, rollover or rollout, rollover, rollout.

The actions that I have in my rollover and rollout methods are really simple. All they do is turn on/off other movieclips...imagine a map...when you rollover an icon, a path shows up on the map and when your rolloff, the path goes away.

However, if I adjust the window of the test movie window, everything appears again!The crazy thing is that when I publish it, this behavior doesn't happen in the browser or as an app! Could it be a memory thing with the authoring environment?

Posting some code here:

private function rollOverUserListener ( e:MouseEvent ) {
trace(">>>>>>>> rollOverUserListener() e.currentTarget.name : " + e.currentTarget.name);
trace("e.currentTarget.alpha: " + e.currentTarget.alpha);
trace("e.currentTarget.visible: " + e.currentTarget.visible);

[code]...