Don’t forget to update Flash CS4 to version 10.0.2

The 10.0.2 update for Flash CS4 Professional addresses issues related to compiling large projects and many other bugs. Specifically, it addresses stability and performance issues related to large animation files, such as Timeline scrubbing and looping and nested movie clips, as well as text handling.

You can download the update here, or choose Help > Updates from within Flash.

For more details, see the technote for this update. For more about this update the Flash product manager, Richard Galvan, visit his blog.