If you're using JAWS, and are experiencing unusual behaviour reading your mx:Text controls, it may be due to an issue in Flex SDK 3.0.0 (or Flex Builder 3.0.0). There were a number of Accessibility updates released in Flex SDK 3.1 (or Flex Builder 3.0.1). Since then Flex 3.2 and Flex Builder 3.0.2 have been released, and official support is offered for those products, try the latest Flex SDK Mileston release available here:

http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+3