I'm so tired of this happening, that I've decided to write a rant about it.

Flash CS3 has this terrible bug where it renders things completely wrong on the stage when you're authoring a Flash file. It happens when you have MovieClips nested in MovieClips, a natural situation in Flash development.

Here is what it looks like when I am inside my MovieClip on the stage called MC_PlaybackController.

And here's what it looks like when I go one level up.

Do you know how often stuff like this happens? Too often.

Here's the kicker. If I save it out as Flash 8 and open this same exact file in Flash 8, it renders correctly. If I make this file in Flash 8 from the same graphics and open it in CS3, it renders it like you see with the volume slider clip appearing in place of the play button clip and the scrub bar clip. I can't do anything to stop this from happening. I've tried all manner of breaking apart MovieClips and creating them again, not naming the instances, naming the instances. Nothing fixes it.

Can you please explain why this is happening? I will happily provide the above FLA.

———
Update: Adobe has acknowledged the issue and explained what is causing it, and has also pledged to fix it in the next release:

Yes, I could reproduce the issue.  It is related to a change we made to
our Live Preview code so we could re-use Player instances when
displaying Live Preview for components and MovieClips with slice-9
guides.

In previous releases, we were creating many instances of the Player for
each component, which was using up a lot of memory.  We fixed that issue
by re-using Player instances, but we introduced this issue because the
code isn't accounting for this case.   (

Anyway, this issue has been addressed for the next release.  Sorry for
messing up your workflow.  At least the assets behave correctly at
runtime, so your customers won't encounter the problem.

Thanks for helping us out.

Thanks,
Nivesh

Sometimes, the squeaky wheel gets the grease. Thanks, Nivesh.