If an image is attached to an object, does the image get deleted properly if the object is deleted, or does it remain in memory (potentially leading to a problem if too many images get created)?

I have a tougher question about images that I still need help on, so please take a look if you know a lot about how images are handled.
Images are tricky things, 'cause they don't get garbage collected (at least in my experience).

However, a quick test in Dream Seeker indicates that they do get deleted. Try it yourself.