I've read about this issue elsewhere and the primary culprit has been Views and the jQuery Update module...particularly having jQuery set to anything but v1.5. I'm getting the JSON dump when saving a node:
I need jQuery 1.7 for an image rotator that I'm using and I found a patch for jQuery Update that allows you to set the version of jQuery for admin and and front-end so I have 1.5/1.7 set respectively and yet I'm still seeing this issue. I have confirmed that jQuery v1.5.2 is being loaded. I do see that jquery.form.min.js v2.69 is being loaded from the jQuery Update module along with jquery.cookie.js...could these be causing the problem?
This is the URL after clicking save and seeing the JSON dump:
The error only seems to occur when I edit a node after searching for it on the Find content page. I'm using the Administration Views module as well.
All modules have been updated as well as core (7.23). I have the jQuery admin overlay disabled in an attempt to solve the problem. Is there anything else I can check/do to alleviate this issue?
Now that the issue is repeatable, I disabled jQuery Update and still received the same JSON dump, so that's not the issue :s