In Adobe Flash CS3, symbols created for use in Adobe Flex must be published for Flash Player 9 and ActionScript 3. If your Flash project has different publishing settings and you create a Flex component from a symbol, the publishing settings are changed to Flash Player 9 and ActionScript 3. No warning message is displayed.
The changes in settings may cause the following message to appear:
- WARNING: Actions on button or MovieClip instances are not supported in ActionScript 3.0. All scripts on object instances will be ignored.