HomeButton does not work

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What steps will reproduce the problem?
1. Click the home button when first starting iBBDemo2
2. Clicking the home button any time after this
3.

What is the expected output? What do you see instead?
I expected to see the home screen but if pushing the button before changing web 
address from "app:/about.html", the program would turn off. If pressed after 
changing web address, sometimes it would shut off, sometimes just reload the 
page

What version of the product are you using? On what operating system?
iBBDemo2 on Linux Mint. 

Please provide any additional information below.
I installed the program via adobeair

Original issue reported on code.google.com by nicholas...@gmail.com on 17 Sep 2011 at 3:42