As I find myself testing Windows 7 and going through articles of "new stuff" to test out and like or not, I keep coming back to a common theme: The worst part I've found so far in Windows 7 is Internet Explorer 8.  Win 7 itself seems to run smoothly and, albeit with the right hardware, fast.  I have been running 64-bit Windows 7 for over 2 weeks now and have been skeptically happy.  The only major problems I keep running into are glitches in Internet Explorer 8.  What gives?  The latest Firefox build does not seem to have the same issues.