Apple today has released another version of iOS 4 to developers. iOS 4.1 Beta 3 has the following changes:

The SDK is build 10M2308 and the firmware is build 8B5097d. There are five distinct downloads, one each for the iPhone 4/3GS/3G and iPod Touch 2G/3G.

This latest build, which comes exactly a week since the last build (normally every two weeks), continues to focus on the proximity sensor issue with the iPhone 4, which was not turning off/on properly when people were handling calls.

Additional changes in beta 3 of iOS 4.1 include:

• Game Center no longer supported on iPhone 3G and iPod touch 2G
• Game Center receives minor fixes
• Tweaks to the sensitivity of the proximity sensor on iPhone 4
• FaceTime and Game Center Parental Controls
• Remote control added for Bluetooth audio