Not much to go on with your disciption,could be if you have installed office 2003 as this could cause the error.The same fix MAY apply to other programs for same message and could be reversed if not cured easily. May be worth a try as it is not a major change?
To resolve this behavior, you must reconfigure the Internet Explorer script debugging options. To do this, follow these steps:
Open Internet Explorer.
On the Tools menu, click Internet Options.
In the Internet Options dialog box, click Advanced.
Click to select the Disable script debugging check box.
Click to clear the Display a notification about every script error check box.