iPhone OS 4 requires newer version of iTunes.

UPDATE 2010.04.20:
If you have iPhone SDK 4 beta 2 installed, iTunes 9.1 will have no problem backing up the iPhone with OS 4.0 beta installed.

UPDATE 2010.04.10:
iTunes 9.1 definitely does not support iPhone OS 4.0 Folders. If you have folders in your iPhone home-screen, iTunes 9.1 will definitely fail to backup the iPhone. In one test, we’ve successfully performed backup and sync an iPhone 3GS (OS 4.0 Beta 1) with iTunes 9.1 where Folders were not present anywhere on the Home Screen.

According to reports, developers are having backup-problems with iPhone OS 4 and iTunes. iTunes 9.1 displayed a message “backup failed because it was refused by the iPhone.” It is apparent that a newer build of iTunes is required to fully interact with iPhone OS 4. Some Developers also reported that Folders on iPhone home screen were undone right after syncing with iTunes 9.1.

As Apple has done in the past, a special build of iTunes should be made available to developers.

Downloading iPhone OS 4 SDK Developer Preview.

11:30 AM Cupertino Time
OK, I’ve “signed” the iPhone Developer Updated Program License Agreement. NDA is in effect now. I can’t talk about it unless Apple revealed it first (or someone else).

11:11 AM Cupertino Time
Apple iPhone Developer Center is being updated. Developer must agree to the Updated Program License Agreement.

Well, since NDA is in effect, I can’t talk much about iPhone OS 4 other than what Apple has revealed today.

It is apparent that Snow Leopard is required to develop for iPhone OS 4.

Apple Haters already hates iPhone OS 4.

Shortly after the iPhone OS 4 preview event, Apple Haters are sounding off how much they hate iPhone OS 4 already. Notably, Microsoft P.R. person Paul Thurrott already built a list of things he hates about iPhone OS 4 before the event even started.

  • It is from Apple afterall.
  • Those features already present in Jail-broken iPhones and iPod touch.
  • Apple stole the ideas from Google’s Android.
  • The UI is pretty much the same thing, unlike Microsoft’s Windows Mobile Phone 7 OS 7 Operating System Seven Series number 7.
  • No Flash support.
  • No Silverlight support.

Other Apple Haters are also saying:

  • Still no Google Voice App.
  • No Internet Explorer.
  • No Flash.
  • No Opera.
  • No Firefox.
  • No Flash.
  • No OGG support.
  • No Flash.
  • No Front Facing Camera (??????????).
  • The App Store approval still sucks (one valid point there).
  • It is still a closed system.
  • It is not Open Source (damn those Hippies!).

The list goes on and on.

Live Coverage Links for Apple iPhone OS 4 Event.

Here it comes, the Live Coverage links to iPhone OS 4 Event set to take place on Thursday April 8th, 2010. Links will be updated as they are made available.

Check back for more links if available.

Apple to unveil iPhone OS 4 on Thursday April 08, 2010.

Apple is set to unveil iPhone OS 4 on Thursday April 08, 2010. It is an invitation only event that will take place at Apple Headquarter in Cupertino, California. The event will start at 10:00 AM Cupertino Time.

Many major tech media will likely provide live coverage of the event. Check back for the coverage links if and when they’re made available.

(Thanks to Engadget for making this news public.)