I’d been noticing big chucks of posts missing from WordPress for a long, long time. I’d understood that these were often due to code tags issues (open tags/invalid tags) due to the code editor, and short of spending a lot of time manually correcting tags in a text editor, could see no solution to the issue.

Today I chanced to read this support thread, which stated that the solution was within WordPress itself, and was simply to enable an option in Settings:


Settings>Writing>WordPress should correct invalidly nested XHTML automatically