Hi, all. I updated to the latest version of Wordpress on my two blogs this morning and since then I've been getting a 500 Internal Server Error specifically on blog post pages that have comments. (An odd distinction, but it's the only one I can find.) However, there was nothing in my error log.

After looking through answers to some related questions on here I tried renaming the .htaccess file in my /public_html folder, which caused the 500 error to become a 404. At that point my log showed a few errors (I assume generated by the 404), which went away after a few minutes. When I regenerated a new .htaccess file the 500 error came back. Permissions on that file are set at 644 and I've also tried changing them around, to no avail.

So, I'm back to a 500 error on post pages with comments, and an empty error log. Any guidance would certainly be appreciated!