The link below explains it--
I chose not to install it since I have installed the patch to void the need to click on a Flash or Java to get it to work.
I also chose to "never show this update again".
This is one update I really don't want.
They should have offered it alone instead of bundling it a cumulative update.
Here is a quote from the link--
"This security update also replaces the compatibility patch released on April 11, 2006. That compatibility patch temporarily returned Internet Explorer to the previous functionality for handling ActiveX controls, to help enterprise customers who needed more time to prepare for the ActiveX update changes discussed in Microsoft Knowledge Base Article 912945. This security update replaces that compatibility patch, and makes the changes in Microsoft Knowledge Base Article 912945 permanent. For more information about these changes, see Microsoft Knowledge Base Article 912945 and the product documentation."
Edited by medab1, 13 June 2006 - 06:47 PM.