Microsoft has made updates to Internet Explorer that change the way active content is displayed. You can view the Microsoft announcement here. Users will see changes as they use cfforms with Flash controls or Java controls. Thecfchart tag is also affected. Internet Explorer will generate a popup with the text "Click or hit enter to activate this control."
Note: ColdFusion MX 7.0.2 does not require this hot fix. The release already includes the fix.