abound

I also have encountered an occasional error where the editor and the function the_content() will strip paragraph tags. Sometimes they’re stripped, sometimes not.

I checked and re-checked my code. No errors.

I finally settled on a hack of adding a class attribute to my paragraph elements. WordPress sees these and preserves the paragraph. It doesn’t matter what class name you use.

My guess is that this is likely a problem with the the_content() function, not the visual editor. That’s based on my guess that the visual editor is saving changes using AJAX and that function is doing the stripping. I’m at a loss to know why it sometimes strips paragraphs and preserves others.

Eureka! For some reason, after running an automatic upgrade on the site, the wp-includes/js/wp-lists.js file wasn’t present. This meant that a JS error prevented the editor from opening the media window as a popup, and this broke the image insert function.

I uploaded the script that was missing.

Solved!

I found what appears to be the cause. A javascript problem I’ve not been able to diagnose:

jQuery(“#categorychecklist”).wpList is not a function

I have the same issue. When I click any of the media insert buttons, instead of opening a popup window like it used to, a whole new page opens. Then, there’s no way for the post insert to work because the associated window is gone!