Microsoft Security Bulletin MS04-004
I thought I had posted this earlier, but I think it's stuck open on another machine at work. We released a new security update for IE.
Microsoft Security Bulletin MS04-004
Cumulative Security Update for Internet Explorer (832894)
You should have seen that come through as an automatic update if you have that feature turned on, otherwise get to https://windowsupdate.microsoft.com and install the update.