Using a ProxySG as an access method to forward into the Cloud strange characters are randomly seen when opening websites. This will only happen when HTTP traffic is forwarded over port 8443 into the Cloud. Below is a sample from IE9 of what may be seen:
Currently a workaround is to disable tunnel on error. This can be done in the GUI Configuration --> Proxy Settings --> General --> Tunnel on Protocol Error. This box should be unchecked.