Cambozola is a handy low fat cheese flavoured Java applet that ZoneMinder uses to view image streams on browsers such as Internet Explorer that don't natively support this format. If you use this browser it is highly recommended to install this from http://www.charliemouse.com/code/cambozola/  however if it is not installed still images at a lower refresh rate can still be viewed. Leave this as 'cambozola.jar' if cambozola is installed in the same directory as the ZoneMinder web client files.