Click
As long as you've been keeping up on your updates then you should be okay to go.
If you notice something funky after clicking on it, mainly in the address bar, or in the left bottom corner when you hover, then you might want to either update your IE or make the switch to another browser.
This flaw allegedly affects Firebird 0.7 to some extent, but there will be something in the Address Bar to clue you in to something not being right. Firefox 0.8 is not affected at all. I don't know about Opera or Netscape, or plain vanilla Mozilla, but others could possibly check it I guess.