One of the long-standing frustrations for anyone who's tried to edit blog posts or web documents using Mobile Safari is the absence of support for the HTML5 contentEditable attribute.



From TUAW:

The contentEditable element attribute, which began as an Internet Explorer 5.5 feature and later found its way into most modern browsers, is part of the suite of tools that makes it possible for Google Documents and other inline editors to do their rich-text WYSIWIG editing magic.

Unfortunately, up through iOS 4.3 there's no support for the contentEditable attribute in Mobile Safari, which means that popular web editing tools either don't work at all or have to provide severely limited iOS-specific versions. According to this thread on Hacker News, it looks like things may be changing in iOS 5; preliminary tests on the beta seem to show that the attribute is working as expected in the new version of Safari.

  Will iOS 5's Safari deliver better support for web editors?