We have an MFC app that embeds the WebBrowser ActiveX control. Starting
in IE7, we've been getting a scripting error due to an exception closing
a window that the user has already closed for pages that we display in
this WebBrowser control. This doesn't happen when the same page is
viewed in Internet Explorer 7, nor does it happen in either situation on
computers with IE5-6.

The following is a JavaScript example that recreates this situation:

var winName = "myWin";
var theURL = "http://www.microsoft.com";
var objWin = window.open(theURL, winName);

// User closes window manually

// For IE7 embedded, the following call will
// generate an exception and stop code execution
objWin.close();

This is a major change in the scripting engine and is breaking our app
for a lot of customers. The change in behaviour is unexpected, and
inconsistent considering it doesn't happen in Internet Explorer itself!

Is this a bug in IE? Or, is there some interface I can query for in C++
to reset the behaviour of the scripting engine to match that of previous
versions of IE or IE7 stand alone?