I have a fresh install on WordPress 2.0.2 with no plugins and I am also getting this error in both IE and Netscape (viewed like FireFox).
I just installed the latest wordpress today and I’m getting this error also.
Then under Dashboard there is a tab for stats. To modify the stats click options then stats.
You upload the files to your wp-content/plugins folder, then log into your admin and click on your plugins tab and activate it.