In answer to the question "How can i use plone.app.jquery 1.9.1 with the latest version of Plone?" (currently 4.3.2) the answer appears to be:
- It's not supported OR
- You can try and configure your site to use a different editor (I actually did try CKEditor but same problem) or no editor (authors work directly in html), and disable popupforms and form_tabbing so there are no console errors OR
- Dont rely on 1.9.1, instead develop your packages to work with jquery 1.7.2 until such time as Plone supports a higher version of jquery.