Are you using Windows Millenium? Well, a couple of my friends have switched back to Win98SE because the "back" button refuses to work under Netscape, even with the Intellipoint software installed. Both of them contacted Microsoft(who said to contact Netscape) and Netscape (who said its Microsoft's problem)without any resolution to the problem under Windows Millenium and version 3.2 of the IntelliPoint software. So basically, the back button won't work under Netscape and WinME, at least until a newer version of the Intellipoint software or Netscape comes out.