If you have enabled Cookies, JavaScript, and Pop-ups, and still have problems, you should then check for any 'Firewall' or 'Web proxy' that might be running on your computer or your network server. In our experience, both Norton and ZoneAlarm firewalls, and the Privoxy filtering proxy, can cause problems.

Also, older versions of web browsers may not handle CSS (Cascading Style Sheets) HTML correctly, resulting in lines overlaying each other.