Revision Note: Advisory updated to advise of the release of Microsoft Security Bulletin MS06-021. Advisory Summary:Microsoft Security Bulletin MS06-021 has been released and replaces Microsoft Security Bulletin MS06-013. The Compatibility Patch discussed in Microsoft Knowledge Base Article 917425 is also replaced by this security update. The changes to the way Internet Explorer handles ActiveX controls is made permanent by the updates included with Microsoft Security Bulletin MS06-021. Microsoft originally released this security advisory discussing non-security update 912945 for Internet Explorer on February 28, 2006. This non-security update includes minor changes to how Internet Explorer handles some Web pages that use ActiveX controls and is being distributed to customers in phases. On Jan 9, 2006, Microsoft released this non-security update for Internet Explorer 6 for Windows XP Service Pack 2 to MSDN subscribers. On Feb 9, 2006 the same update became publicly available on MSDN. On February 28th it was distributed as a recommended update on Windows Update for Windows XP Service Pack 2 and for Windows Server 2003 Service Pack 1. For the final phase of distribution, this non-security update is included in Microsoft Security Bulletin MS06-013, released on April 11, 2006. This security update replaces non-security update 912945 for Internet Explorer. For more information about this non-security update for Internet Explorer, see Microsoft Knowledge Base Article 912945. Although most Internet sites have already prepared for the changes in the way that Internet Explorer handles some ActiveX controls, some enterprise customers have given feedback that more time is needed to ensure that corporate line-of-business applications are compatible with this change to Internet Explorer. Compatibility Patch â?? To help enterprise customers who need more time to prepare for the ActiveX update changes discussed in Microsoft Knowledge Base Article 912945 and included in Microsoft Security Bulletin MS06-013, Microsoft is releasing a Compatibility Patch on April 11, 2006. As soon as it is deployed,
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