Using Windows 7 64bit, Internet Explorer version 9, and Display Fusion 4.2.0 (beta 6) download a file with Internet Explorer, and give another program focus while the download is happening.
When the download has finished, the Internet Explorer taskbar entry will flash briefly on the main taskbar to inform you the download has finished. If Internet Explorer is on my second monitor then the entry on the taskbar will flash "endlessly". It never seems to stop flashing on its own, only when I give Internet Explorer focus.
Not exactly a big problem, but it gets a little irritating after a while. Hopefully easy enough to reproduce