This question was posted in response to the following article: http://help.adobe.com/en_US/flex/using/WS0ab2a460655f2dc3-427f401412c60d04dca-7ff3.html
The article assets that if you make a change in an editor and then tab or click out of it, the change will be saved. However, this is not the case in the above example with the NumericStepper. Hitting the Enter key will save the change, but tabbing or clicking out will not. I can replicate the problem in my code as well (Flex 4.6). Is this a known bug?