Strange disappearing  problem with Drupal 7 In CKEditor, source view, I see &lt;p> tags around my paragraphs. That's great, makes sense. However when I view the node, the &lt;p> tags are gone, replaced with &lt;br> tags, thus killing the margins and cramming everything together. Re-editing the node brings the &lt;p> tags back again in CKEditor.

I have tried changing the text format to disable "Convert line breaks into HTML", but of course that just removed both &lt;p> and &lt;br> tags, making one huge paragraph.

How do I prevent this and preserve the &lt;p> tags?
Ah, I found it. In /admin/config/content/formats/filtered_html, I needed to add &lt;p> to the list of allowed HTML tags way at the bottom of the page. I'm not sure how/why this problem didn't show up previously...but this solved it.