My iphone is not receiving push notifications. Until a week ago it was working perfect, and with the new version the app store automatically download is not!
Since I am totally dependent upon the push notification working (I am using chat instead of SMS (unlimited data plan, has to pay for SMS) to keep in touch with my girlfriend) I am now using Beejive GT instead.
But to answer your question; yes I was using the push proxy. It worked with no issues with the previous versions and it stopped working when upgrading to the new version. I did not change any settings after upgrading.