I'm using growl4rails with this code in the layout:

<% if flash[:notice] -%>

<script type="text/javascript" language="javascript">
    Growl4Rails.showGrowl({image_path:"/images/icons/notice-icon-32.gif", title:"Notice", message:"<%= flash[:notice]%>"});
</script>

<% end -%>

but Internet Explorer 7 show me the popup then stop the page rendering with this message:

Internet Explorer cannot open the Internet site
<myaddress:3000>
Operation aborted

clicking on the "ok" button IE show me the error page:

Internet Explorer cannot display the webpage

Most likely causes: You are not connected to the Internet.
The website is encountering problems.
There might be a typing error in the address.

What you can try:

 Diagnose Connection Problems  

 More information 

This problem can be caused by a variety of issues, including:

Internet connectivity has been lost.
The website is temporarily unavailable.
The Domain Name Server (DNS) is not reachable.
The Domain Name Server (DNS) does not have a listing for the website's domain.
If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section.

For offline users

You can still view subscribed feeds and some recently viewed webpages.
To view subscribed feeds

Click the Favorites Center button , click Feeds, and then click the feed you want to view.

To view recently visited webpages (might not work on all pages)

Click Tools , and then click Work Offline.

Click the Favorites Center button , click History, and then click the page you want to view.

With IE8 the error isn't showed but the page rendering stops after the popup code line.
With FF,Chrome,Safari and Opera everything works well