Internet Explorer 10 full changelog

Web Worker Profiling:
· When profiling an application with the F12 developer tools, you will only see activity from web workers that were started after you began profiling. To work around this issue, make sure the profiler is started before the worker(s) you want to profile.

· Placing comments before the DOCTYPE declaration incorrectly puts IE10 into quirks mode.

Platform Preview setup shows an error dialog if you have open windows of older Platform Previews:
· If you have open windows of older Platform Previews running while you install the latest available Platform Preview, you will see an error dialog during setup. To avoid this issue, please close all open instances of the Platform Previews and re-run the newest Platform Preview installer.

Platform Preview Build opens links to *.EXE files as text:
· Description: When you click a link to an executable (.EXE) in the Platform Preview, it will open in the Platform Preview as a text file.

Breaking Changes

Event object's 'trusted' property
In recent changes to the W3C DOM Level 3 Events specification's Last Call feedback, the working group elected to change the 'trusted' property to 'isTrusted' to match the property of the same name and semantics in Mozilla browsers. IE's implementation of this property has been adjusted to match.

DOM Programmability
Invoking cached DOM functions without using the dot (.) notation and without using call/apply/bind now throws script errors. The previously supported legacy function invocation pattern has been removed for better interoperability and standards support:
var g = document.getElementById; g(‘test’); // Now throws an exception
Enumeration of DOM objects previously only included properties and event handlers. With IE9 and IE10 standards mode, enumeration now includes functions as well.