[Plugin: WP-reCAPTCHA] Undefined variable errors

I just installed the recaptcha plugin and I’m getting some warnings ahead of the captcha widget which is showing up:

Notice: Undefined variable: needed_capability in /...../public/blog/wp-content/plugins/wp-recaptcha/wp-recaptcha.php on line 438

Notice: Undefined index: rerror in /....../public/blog/wp-content/plugins/wp-recaptcha/wp-recaptcha.php on line 443

Notice: Undefined index: rerror in /...../public/blog/wp-content/plugins/wp-recaptcha/wp-recaptcha.php on line 494

I looked at the code and on line 430 of the ‘wp-recaptch.php’ file is the following:

function recaptcha_comment_form() {
   global $user_ID, $recaptcha_opt;

   // set the minimum capability needed to skip the captcha if there is one
   if ($recaptcha_opt['re_bypass'] && $recaptcha_opt['re_bypasslevel'])
      $needed_capability = $recaptcha_opt['re_bypasslevel'];

	// skip the reCAPTCHA display if the minimum capability is met
	if (($needed_capability && current_user_can($needed_capability)) || !$recaptcha_opt['re_comments'])
		return;

It appears that the variable $needed_capability is not being set up because $recaptcha_opt[‘re_bypass’] is not TRUE. It is actually NULL. $recaptcha_opt[‘re_bypasslevel’] is set to ‘read’. It appears to me that if $recaptcha_opt[‘re_bypass’] is NULL then $needed_capability is never set although it is tested in the following line (438).

Is there a default $needed_capability set somewhere that is not being picked up? Thanks for any help!

http://wordpress.org/extend/plugins/wp-recaptcha/