Greg, you are the man!! Upgrading to AIR 28 did the trick and I no longer have these annoying artifacts. And now I am aware that I should read the release notes.
But I still have the concern as to whether I will be able to submit an .ipa to the App Store that was compiled using AIR 28 in Flash Builder. Does anyone know if this is a problem? -- Sent from: http://apache-flex-users.2333346.n4.nabble.com/