[msftguy]

I recall Cydia being pretty broken in iOS 4 beta days, and using undocumented APIs for no reason (it was obviously written before the public SDK, but there was no reason NOT to rewrite it once the SDK was out).. So that seems pretty hypocritical of you to want Apple to 'weed out' apps using a special environment that app can't even be tested against by the dev. Also, average iOS app lifetime isn't long enough to even remotely justify such draconic testing measures - most will be out of the app store charts long before there's a breaking change in iOS.

[saurik]

There is always a reason to not rewrite something once it is released and operational: there are almost certainly other things you can be doing that would provide higher value.

(Also, I am reasonably certain that the issues you are eluding to with Cydia not working correctly on iOS 4.0b* were, as usual, WebKit issues, which I specifically admitted in my post: and, in fact, during 4.x is when I came up with a much simpler way to handle that specific implementation detail. That said, looking through my git repository, the only changes I seem to have made for 4.0 seem to be to things that fundamentally are not public APIs: restarting SpringBoard being the major one.)

[msftguy]

It was 4.2b, my bad. Cydia was using some UI class from a private framework that got removed in 4.2 betas.

[Xuzz]

Yeah, there was _UISwitchSlider class or something being used. I ripped almost all of that stuff out for "Cydia 1.1"; except for saurik's WebKit code to replace the crippled UIWebView, it's almost entirely public APIs now (UIViewController, UISwitch, etc).