how to remove DNN version number on the tab

update DNN site from version 3.1 to 3.3.7, now when i open the site in IE7, the version number is displayed together with the page title on the IE7 tab:

My Site > Home (DNN 3.3.7)

in order to get rid of the stuff in '()', Log in as superuser ("host"), go to host settings in host menu and uncheck "show copyright credits".