New Internet Explorer KB articles
A script may not run as expected in IE when you open an HTML page and the HTML page contains an element that has injected HTML code
This issue occurs because Internet Explorer sets the security of an element as "about:blank" if the following conditions are true:
• A Web page inserts code into the element.
• The element is not included in the markup tree.
Certain characters in a file name may be converted to underscores when a user downloads a file by using IE7
This problem occurs because the Wininet.dll file resolves certain file stream issues when users download files by using Internet Explorer 7. To resolve this problem, do not use "Content-Disposition: Attachment; filename=" HTTP header.