Display.save problem in Ipad

In my app, i want to capture the entire screen and upload it to facebook. Display.save() might be better choice than display.captureScreen().

But I’m running into a problem that display.save doesn’t capture full screen when view in iPad. My sample code is here http://developer.anscamobile.com/sites/default/files/webform/ScreenShotBug.zip, and this is the screen shot http://developer.anscamobile.com/sites/default/files/webform/Capture_01.JPG.

Is it because of enabling dynamic scaling in my config.lua?
Any idea, please help. [import]uid: 81883 topic_id: 25447 reply_id: 325447[/import]