To an email-syncing office drone with an iPhone 3G, this change looks like a bug. To an IT admin, this change actually looks like a bugfix. But no matter how you see it, Apple screwed up somewhere down the line.
Now that the iPhone OS 3.1 SDK (and accompanying beta firmware) is out in the wild, new features are showing their faces. The update improves video editing and app integration, Voice Control over Bluetooth and a slew of minor tweaks.