There continues to be chatter on this being only iClouds.
What I have found is *if* iCloud is configured on the device, AT ALL, even for "Find my Iphone" push stops working.
This is the case across Google Mail for Apps (Domains), Exchange 2007, Exchange 2010.
I never had or checked e-mail at mobileme or iclouds, but if the icloud was configured, push stopped.
I have succesfully had push working on both the iphone and ipad (gen1) since deleting the icloud account months ago. So long ago, that I didnt even go look at my last post. It was on or around page 12 or so.
The issue is not with any specific piece of hardware, new, old, as it happens on 3GS, 4, 4S. It is common to 5.x.
It seems that since Apple users have little troubleshooting skils (save maybe 5 people on this thread) and since the product should "just work", when it does not, no one has a clue how to troubleshoot anything.
Am I saying most idevice users are idiots? No, but most are not technicallly advanced enough to do a beta test on a product and isolate the issues based on changes.
There is no hope to getting iCloud fixed unless Apple actually comes to the conclusion that there is a problem, which they have not. This is indicated by the dipsh*t genius bar tards, as well as the upper levels of Apple that have installed loggers on more than one device to test. All with silence and no real input.
I have to say, I was no fan of Job's and far from a fanboi, but at least when Jobs was at the helm this kinda nonsense was not happening.
My suggestion is to just garbage can iCloud mail, since if you had a mobile me account, you had to change anyway, if you have to change e-mail, why not change to a service that is free and works. Gmail is that solution, and if you have a domain, and want to run up to 10 users on it for free, Google is still the option with Google Apps for Domains (or whatever the latest name is). These services "just work", and Gmail has not had an outage since Dec of 2007.
At one time an @me.com account might have been cool, but now it is about a useless as when mom.com was giving away accounts, since they are dead.
The best part of gmail, is in it's lifetime the domain has never changed.