Sitecore Firebug Javascript Error

Using IE8 with Sitecore there is sometimes a javascript error that has to do with a firebug lite item that Sitecore has embedded into the designer. To get rid of firebug lite and thus the error, do the following.

Open the Core database, navigate to /sitecore/layout/Devices/Internet Explorer and delete the Firebug Lite item.

This information originally comes from a Sitecore developer.

http://stackoverflow.com/questions/2513586/is-firebug-lite-javascript-must-need-in-sitecore-shell