Topic: prototype.js Object Required error

Whenever I load my site with IE, bottom left always shows "Done, but with errors on page".
If I click on it and show the detail, it says:

Object required 
prototype.js    Line:2271
Code: 0      Char: 5
URL: http://localhost:3000/javascripts/prototype.js?1265177611

I have not modified prototype.js and it's annoying to keep seeing this error.  Anyone knows how to resolve it?

Re: prototype.js Object Required error

Do you have access to firefox - does it work there?
Sometimes your objects need to be $(this) instead of $this for things to work in IE.

What prototype code are you running when you get this?