In the book there are several <mx:dataProvide> components, one which included an Array. I'm running the trial of Adobe Flex 2.0 on a mac and ever time I use that component I get no functionality coupled with this error message:

Severity and Description Path Resource Location Creation Time Id
Could not resolve <mx:DataProvider> to a component implementation. Chapter 6 main.mxml line 17 1191720034841 350