admin mode problem with Egglue/reCAPTCHA

confirmed (only tested reCAPTCHA)

after disabling javascript, the page loads normal and the form processing works as expected

further looking into it..

I guess the easiest way to solve this is to disable the admin mode (presolving) for challenges like reCAPTCHA and egglue

Ok, I think I'm on to something (which was not easy, the mix of iframes, javascript, external api's is not very comfortable to debug)

The admin mode CAPTCHA example is inside a collapsible fieldset.

$captcha_element = array(
        '#type' => 'fieldset',
        '#title' => t('CAPTCHA'),
        '#collapsible' => TRUE,
        '#collapsed' => TRUE,
      );

If I set the '#collapsible' property to false, there is no problem of a blank page and trying to access the apis.
Setting the '#collapsed' property to false does not change the weird behavior on the other hand

Apparently the Javascript that handles the collapsible fieldset interferes with the reCAPTCHA/egglue javascript, which causes the weird behavior.

I'm no Javascript expert, and the problem is hard to debug, so I welcome other people to look into this

a bit more confirmation:

the problem is not related to admin mode on itself: if I make the fieldset for non admin, anonymous challenges collapsible, the same problem occurs.

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#525586: AJAX API seems to tackle the same problem as this thread and has more eyes on it
setting this one as duplicate for now

Soxofaan - Not really the same issue, but might be related. I'm not using the ajax comment module that the other person who started the #525586: AJAX API issue is. But I'm no fluent in java at all.

Hi all,

In preparation for a final 6.x-2.0 release I added temporary workaround for the problem:
reCAPTCHA and Egglue are now blacklisted for the CAPTCHA admin preview:
http://drupal.org/cvs?commit=265144

This is a temporary workaround and should be removed once the problem itself is solved.
Setting this issue to a postponed feature request now