[Plugin: Google Analytics] Destroys page info

After installation the information displayed by facebook when I type the address in the comment field is code from the plugin, instead of my text on the page. And when plugin is removed it does not clean this up.

Hinnøyhytta
http://www.hinnoyhytta.no/
(function() { var ga = document.createElement(‘script’); ga.type = ‘text/javascript’; ga.async = true; ga.src = (‘https:’ == document.location.protocol ? ‘https://ssl’ : ‘http://www’) + ‘.google-analytics.com/ga.js’; var s = document.getElementsByTagName(‘script’)[0]; s.parentNode.insert…

http://ww.wp.xz.cn/extend/plugins/googleanalytics/