this may not be the perfect juncture for this question / observation, but as I am confident that Morbus knows the answer, I'm going to give it a try.
I'm getting 405 errors from Apache for any POST request. I've had a look at the access log files to verify this, and all POST requests are resulting in 405.
This is odd, because a couple of days ago, I tried the PHP test in the article (hello.php POSTS data to action.php), and it worked fine.
As far as I'm aware I have not changed anythingin the httpd.config file since then - but I am having my doubts.
I've had a good look throught the Apache documentation, and I can't find anything that might cause or rectify this issue.
Any thoughts - anyone?