One of the reports is called Top Browsers and shows which web browser that the users are using to access the site. For a public facing web site this report might make sense but for an Intranet the results may cause you a headache if you do not understand how to interpret the data.
Let's assume that you have an Intranet with a standardized web browser platform with Internet Explorer 8. If you take a look at the statistics you will first notice that the most used browser isInternet Explorer 7, following that are most often Unknown and/or Netscape4. Internet Explorer 8 is coming later down (together with instances of Safari, Firefox, Chrome etc. - some people just have disobey the corporate rules :-).