[Plugin: Advertising Manager v3.4.18] – Script Problem

When I click on an ad inside the advertising manager panel, I am taken to the ads page but I am now getting repeated IE Warnings:

Stop running this script?
A script on this page is causing Internet Explorer to run slowly. If it continues to run, your computer might become unresponsive.

This just started since upgrading to WP 3.1. I also find that the plug-in is now excessively slow.