Regenerating a CAPTCHA

"The Definitive Guide to Yii" describes a testdrive app in "Creating First Yii Application.  If there are errors in the form on the contact page, the page is regenerated  (with an error message added).  The CAPTCHA on it does not refresh–you get the same image after an error as you did before?  Is there a way to force it to refresh so that you get a new image every time (even after form errors.)?

Check this: http://www.yiiframew…ction#testLimit

Thanks, I’m officially embarrassed.  :-[