It must be a bug:
When I make changes to a FLA, save and close, these changes are not actually
saved. So, when I open the file again the changes are not there so I have to
re-do them. I have figured a way around this bug, and that is by instead or
normal saving (cmd+S) I do Save As (cmd+shift+S) and save with the same name
and overwrite.

I have all the latest software updates. It is quite frustrating because if I
come back to the file and do other changes and export it makes it seem like I
didn't do the previous changes.

I am using a MAC. Has anyone encountered thiss? Is there a real fix instead of
my cheap work-around?

Thank you

I was on the phone with Adobe support concerning this issue and all I had to do
was:

Delete the following file:
User > Library > Preferences > [b]Flash CS3 Preferences[/b]
Rename this folder:
User > Library > Application Support > Adobe > Flash CS3 > en >
[b]Configuration[/b]
to [b]Configuration Old[/b]

It's all working fine, for now. If the problem re-appears I was advised to
reinstall the program