XML Gallery - Memory Issue

I’ve opened up my performance window and I can see that during each transition my memory jumps up to 90%!! At first I thought that it might be doing this because it’s preloading the new image before the transistion, however, after it loops through the series of images, it still jumps up that high? Why? How can I reduce this? I do have a delete onEnterFrame when the preloader is done.

My transistion is a simple crossfade and the image size s 760px x 470px.

Any thoughts?