Apple has sent out an email to registered iOS developers letting them know that it is now accepting submissions for iOS 4.2 apps. According to the email, which was submitted to iLounge by a reader, the apps need to be built, tested, and compiled using the iOS 4.2 SDK GM seed and iOS 4.2 GM seed released yesterday before being submitted for review “so they can be ready when iOS 4.2 is available to iPad, iPhone, and iPod touch users.” In addition, a few small new changes have been discovered in the iOS 4.2 GM seed, including a change to the Multitasking bar that allows fast access to both Brightness and Volume controls, along with a new AirPlay button, which has changed from a dot with radiating waves to a box with a triangle pointing into it. In addition, the new MobileMe account setup in iOS 4.2 GM lets users log into MobileMe settings using an Apple ID, although the Apple ID logins don’t seem to work yet, according to Mac Rumors.
Our reader added that the overall speed of iOS 4.2 on iPad is much improved, and that audio streaming over AirPlay from iOS devices to Apple TV appears to still be unstable, with drop-outs surprisingly common – the issue appears to be network-related. Updates to the Apple TV and Remote applications appear to be necessary to enable AirPlay video and photo streaming, as iOS 4.2 devices currently do not have any obvious way to share videos or photos, and iPad users will also receive a number of new wallpaper options relative to iOS 3.2. Also noticeable is a color bug in PDF rendering. Finally, the iPad’s side switch continues to be a “mute” button under iOS 4.2 GM, but only mutes alert and keyboard sounds, not other audio, which is odd considering that the iPad has so few alerts.