Arfa Daily wrote:

Yes, it's odd, but it is definitely the cause. There was one app listed,
which is a Caesars Las Vegas 'in house' thing. I don't recall it ever having
told me anything though. It's been on my Touch for a long time, and has
never caused a problem in the past. It's not an app that I use anyway, so
maybe I'll just remove it .

Time will tell but it's either a bug or a feature in ios4.

That push notification stuff came in with one of the 3.x updates, but like
you, never saw any useful using it, at least on the ipod touch. I had about
8 or 9 apps that had push in them but only one would randomly get a message.

But the behavior with the wifi when it's sleeping is changed with the 4 from
the 3.x stuff.

I noticed it because the router I use for the dsl has a separate "wireless"
light on it, comes on when someone is using wifi. We only have two wifi
devices, the wifes laptop and my iPod.

The morning after the ios4 came out I noticed first thing the light was on,
still on an hour later. Checked and her stuff was packed away, she was
sleeping. The ipod was in sleep mode.

I took a quick look at the local network map on the router and sure enough,
it showed the ipod active and on the wifi, nothing else. Turned it off, the
wifi light goes dark.

Hmmm.

Turning off the push stuff made things go back to the old behavior, ipod
sleeps, the wifi light stays off on the router. If it comes up once in a
while, I don't know, never noticed it.

Only thing I can figure is, with the 3.x if the ipod is sleeping, you just
wouldn't of received push notifications. Maybe now you do with the ios4.
Even with it sleeping, it keeps the wifi in a listening mode or something.

-bruce