Hi, please consider replacing the current captcha with the recaptcha from Google. It seems a lot friendlier and much easier on tablets, phones, any of the touch screen devices. I am seeing it used on a lot of sites I access, like MailChimp etc.
https://www.google.com/recaptcha/intro/index.html (https://www.google.com/recaptcha/intro/index.html)
Thanks for at least thinking about it for future release.
Lee