Doesn't play well with back button on safari

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Post the captcha normally.
2. Hit the back button.
3. Post the captcha again.

Expected to see that the captcha was correct. Instead, the captcha ALWAYS fails 
right after pressing 
the back button and re-submitting, even though the challenge is unique and not 
the same as 
before. This is what happens on the live demo on the recaptcha site.

The problem only occurs on Safari. I have tested it on Firefox on the same OS 
and it works fine. 
Running Safari 4.0.5 on OSX 10.6.3. Safari has no plugins other than 
Click-To-Flash. Issue is 100% 
reproducible. BackButton + Post = fail.

Original issue reported on code.google.com by genius.w...@gmail.com on 20 May 2010 at 7:16

[GoogleCodeExporter]

This occurs in all Webkit-based browsers because they are posting to reCAPTCHA 
with the original challenge key instead of refreshing the key. reCAPTCHA was 
designed to be re-displayed on the same page in the event of a failed attempt, 
thus refreshing the key. Not really a bug, that's just how it was designed.

Original comment by brandon....@gmail.com on 1 Aug 2010 at 12:12

[GoogleCodeExporter]

User agent issue, not client library.

Original comment by adrian.g...@gmail.com on 30 Mar 2012 at 6:12

• Changed state: Invalid