Q&A Plugin with Use Captcah

So I'm using Q&A Plugin with Use Captcha turned on for anonymous posting. Good, that. And when it fails, when a user gets a captcha wrong, a blank error page with this:

Characters entered do not match the image. Please use your browser's back button to edit your question.

Also reasonable. BUT when I hit the back button, my question form saves the Title in input#question-title but completely loses the content/question/comment in iframe#question-content-ifr. Not so reasonable, that.

Now it's useful to have a captcha especially when we want anonymous questions; but it's not acceptable for a well-meaning user to get that captcha wrong and lose all of his/her content. Any solutions for a captcha error that still saves all the user content?

Thank you.