That's no longer the case. "This is probably because Apple can't reliably iCloud backup, or iCloud sync from anything that's not stored in the native [iOS] CoreData storage," Bansod speculates. One developer at the Phonegap forum say he was told by "an Apple guy" that the reason for the change was "they did that to save space, because with apps loading a lot of content into a UIWebView (like Twitter), it takes a lot of space [being backed up to Apple's iCloud service]. ... But they completely forgot us, poor phonegap dev[elopers], relying into LocalStorage or WebSQL to store users' data."
In effect, apps without a workaround will "forget" data. Users might lose data too logging into a website repeatedly because their app which used use to store their relevant user data no longer does so, for example.
At least some developers hoped this change was actually a bug and Apple would fix it. On March 7, with the announcement of the new iPad, and iOS 5.1, they discovered that Apple had pushed them into some new territory. "They did it. Apple has released their app with that bug. I already got angry users that lose all their work on my app :-/," posted Sam at the Phonegap forum.
The workarounds have not been simple, as you can see following a discussion thread for one Phonegap plugin, created by Shazron Abdullah at the Apache Software Foundation.
No advance in HTML5 features
Sencha's scorecard also found an absence of any new HTML5 functions in iOS 5.1 and the newest mobile version of Apple's Safari Web browser. "No new features showed up between iOS 5.0 and iOS 5.1," he writes. "iOS still features some of the best HTML5 support on any mobile browser, but this latest incarnation hasn't increased the depth of Mobile Safari's support for the standards."
Safari 6 on the Mac, for example, supports a feature called Cascading Style Sheets (CSS) regions, a way of making it simple to create and change digital magazine layouts. But it's missing from the current Safari on iOS 5.1 devices.
As is well known, the new iPad uses a version of Apple's dual-core A5 chip, with a new, quadcore graphics processor.