Recaptcha suddenly not functioning anymore

The widget is showing but no text is showing anymore - so it is not possible to fill in the form. It worked fine for about a week and then suddenly failed. I deleted the key and recreated a new key but that had no effect. Any ideas? -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.