Apple "support" with fixed position layouts

This really echo's the reasons why I still have trouble with the 'thoughts on flash' mentality (although, I know flash is irrelevant here). It's similar in that there is this self proclaimed 'support' for html5 (making needing flash irrelevant)… but in real life the devices are far from supporting HTML5. Support to apple and support to developers is a totally different story. Even many simple things that are HTML5 become very difficult in developing for iPhone, iPad or other iOS devices. Here's an example of many issues that result in attempting to use features that iOS claims to "support".

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Issues with position fixed & scrolling on iOS
With the release of iOS 5, fixed positioned layout is said to be supported in MobileSafari. The word supported needs to be taken with a pinch of salt, because there's all kinds of issues which I i…