We installed rapidscada (v5.8.4) at a live site and their software/hardware blocked the pages that we have added. It was traced to having “http://rapidscada.net/stats/?serverID=xxxxx xxx” at the bottom of the web page (looking at the page source code).
By default the web application includes a frame with the above URL that contains a Google counter. To remove it, open the Webstation configuration and untick the “Share depersonalized stats with the developers” checkbox.