Question

On a browser by browser comparison. Captcha in the yabe example worked great on Firefox 5.0 but was randomly generated junk on Internet Explorer 9

�PNG  IHDR�2��" IDATx��\}lE�*P+-RK��4DkD�j"*�F$�j$(�b� *��>BAĈ�"}�&5"��1�b�? ��ZE�h@c@-    X�G_�3ys�r���}���/���w�s���ٙ�}O ���s�ӀM���o7�^��<`-p0Ev'K�wo���" �5�z�E����PU��o�Y3
�-4�g`�r���{� `1p#����+�2��l�V��¸�n�?� l��(/IBʆ�7\� N����i���\�/�i ;��)lx�m�ܛ        \

etc etc etc

Is there a way to make captcha work as expected on IE9?

Answer 1

I found this snippet:

Images.Captcha captcha = Images.captcha();
String code = captcha.getText("#E4EAFD");
Cache.set(id, code, "30mn");
renderBinary(captcha);

I think you should set the content type before rendering:

response.setContentTypeIfNotSet("image/jpeg");