Things You Must Do Before Unloading a SWF File

Wow this is really important. It reads "Danger Will Robinson. Danger!" The following I found from a friend who referenced Colin Moock in which deactivation of a swf requires the following tasks to be disabled.

• Tell any loaded .swf child assets to disable themselves.
• Stop any sounds from playing.
• Stop the main timeline, if it is currently playing.
• Stop any movie clips that are currently playing.
• Close any connected network objects, such as instances of Loader, URLLoader, Socket, XMLSocket, LocalConnection, NetConnections, and NetStream.
• Release all references to cameras and microphones.
• Unregister all event listeners in the .swf (particularly Event.ENTER_FRAME, and mouse and keyboard listeners)
• Stop any currently running intervals (via clearInterval()).
• Stop any Timer objects (via the Timer class’s instance method stop()).

Not doing so apparently allows the swf to consume resources and not get destroyed. Go here to read more:

http://www.moock.org/blog/archives/000279.html