-$dir = dirname(__FILE__) . '/';
-$wgExtensionMessagesFiles['FancyCaptcha'] = $dir . 'FancyCaptcha.i18n.php';
-$wgAutoloadClasses['FancyCaptcha'] = $dir . 'FancyCaptcha.class.php';
+/**
+ * By default the FancyCaptcha rotates among all available captchas.
+ * Setting $wgCaptchaDeleteOnSolve to true will delete the captcha
+ * files when they are correctly solved. Thus the user will need
+ * something like a cron creating new thumbnails to avoid drying up.
+ */
+$wgCaptchaDeleteOnSolve = false;
+
+$wgExtensionMessagesFiles['FancyCaptcha'] = dirname( __FILE__ ) . '/FancyCaptcha.i18n.php';
+$wgAutoloadClasses['FancyCaptcha'] = dirname( __FILE__ ) . '/FancyCaptcha.class.php';