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A new set of public APIs lets Windows Internet Explorer 7 add-ons specify a thread as a "peer" to the tab thread. This means that the peer thread is visually associated with a tab and that logic, such as unintended dialog suppression, should treat dialog boxes that come from the peer thread the same as dialog boxes that are invoked from the active tab.
Security update information
To resolve this problem, install the most current cumulative security update for Internet Explorer. To install the most current updates, visit the following Microsoft Web site:
Note This update was first included in security update 961260 (MS09-002). For more information, click the following article number to view the article in the Microsoft Knowledge Base:
961260 MS09-002: Cumulative security update for Internet Explorer
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.