The Register does not have an unblemished record when it comes to reporting on Apple. But they've got what appears to be a well-sourced analysis out today about problems with HTML-based apps running on iPhones and iPads. Remember that because of Apple's new and anticompetitive subscription app rules, more developers and publishers might be forced to offer HTML-based apps instead of full-powered iOS apps.
What's more, such "home screen web apps" can't use various web caching systems, including the HTML5 Application Cache, which means they can't be cached to run offline. And they aren't rendered using Apple's newer "asynchronous mode". They're saddled with the old "synchronous mode", which means means they don't quite look as good.
-The Register, March 15, 2011
UPDATE: Software developer Rafe Colburn thinks this is an unintentional bug that will be corrected.