iOS 4 New Feature: Message Failure Mark!

TiPb has just reported that there's a new feature discovered in the iOS 4 which wasn't avaliable in the previous FWs. This new feature is when you send SMS or MMS and it fails, you get an Message Failure badge or Mark as in the screenshot below.

If you haven't tried iOS 4 yet, you can Download iOS 4 from here, then Check my quick features walkthrough posted here. At last check my List of Apps that are ready for Multitasking posted here.