Apple sent out their Firmware 2.1 Beta 4 to developers, it seems. The focus of this update? Why, bug fixes, of course.

What's interesting though is Apple removed the push notification service from this release. As you may remember, this service is intended to act as the basis for background process support. This would be especially beneficial developers of messaging services like AIM. Prior to this development, the feature was to be delivered in September, but that seems like it won't happen now.

It's unclear the reasons why push notification was removed, but we do know that it is being held for "further development." Perhaps Apple is being extra cautious now and waiting to release changes and updates until they are certain they will work. They've probably had enough of the MobileMe fiasco and don't want a repeat.

[via MacRumors]