When running a Web application, you need to click twice to successfully select an item, such as, selecting a radio button on the download page, which normally should require only one click. This problem occurs only at the first selection and in the following environment: Windows 2003 and Internet Explorer SP2.
Cause: This problem exists with patch kb912945 and patch kb912812 of Internet Explorer SP2.
Solution: Currently there is no better solution than uninstalling patch kb912945 and patch kb912812.