I'm pulling my hair.
The movie does not resize.
The problem is:
when I load the gallery.swf movie (via a navigation button) inside my main presentation movie, the overall layout is pushed a few pixels to the bottom.
If you take another closer look at my screen shots, you will se that in the first one there is an equal size bar in top and in the bottom of the screen (this will depend on screen size), and when I click on the button on navbar to call the gallery all the stage of the main movie is pushed to the bottom and the bar on top of the screen increses in size and the bar at the bottom disapears because the movie was pushed to the bottom (as you can see on the 2nd screen shot). This may be something in the action script, but I'm no expert and I can't figure out. Even so, I've made some tests and played with the setings of the stage align; found that "T" it's the best for my project ("B" or "L", for example, caused a worst problem), but that's not enough. There's something more messing with the aligment of the main movie.
I can't be more specific than this.
I hope you had understand my problem.