This release is aimed to fix the PSOD that some iPhone users experienced and a 501 error that developers were getting annoyed with.

The third beta version of the iPhone SDK includes Interface Builder, Xcode IDE, Instruments, iPhone simulator, frameworks and samples, compilers, and Shark analysis tool.

There are 3 different types of SDK packages as such, the Standard ($99), Enterprise ($299) and Free. Depending on what you plan on doing with the software you create will determine which package you will need. You can download the free version or register over at the Apple iPhone Dev site.

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