AreYouAHuman not working with Contact Form 7?

After using AreYouAHuman's plugin PlayThru for some time, I got to say that PlayThru is one of the best captcha programs that actually works. And its design is way better than those captcha plugins that use images for verification, some of those images are really hard to read for most of the time.

Currently, the daily number of spam comments almost reduce to zero, that is pretty amazing! Afterall, PlayThru is quite fun to use, who would mind to play a little flash game from time to time?

Another great advantage of PlayThru is that it works with Contact Form 7 very well. However, I noticed that sometimes PlayThru would stop working, i.e. the flash game works, gets verified, but the message content could not be submitted. I figure there must be a bug or conflict of some sort after the plugins' updates. So I edit the contact form, re-select the PlayThru element, insert a new PlayThru tag into the form, and the form works again. So next time, if there is any update on your AreYouAHuman or Contact Form 7 plugin, remember to check your form again.