Chartboost not showing any interstitials

I am trying to submit a new app to the appstore and chartboost seems to be broken.  The old SDK, missing an internet connection, freezes, the new SDK does not download anything.  The old SDK only downloads the more apps page and not interstitials.  I am in test mode.  

My website configuration seems fine (the nice people Chartboost support has run a test with their native iOS SDK and all downloads correctly).  So the issue is either on Corona or on my code.  Using build 1259.

If anyone is experiencing similar issues please let me know.

Please see this topic:

http://forums.coronalabs.com/topic/41917-warning-about-using-chartboost-with-corona/

Please see this topic:

http://forums.coronalabs.com/topic/41917-warning-about-using-chartboost-with-corona/