I installed Serendipity and discovered that I needed to upgrade my version of PHP to get it to work. I upgraded PHP and configured Serendipity and everything worked fine but I found that when I upgraded PHP, horde broke.
I was having problems compiling php with the current release version and found that I needed a stable csv version. So long story short, php is working (v4.3.5RC2-dev), horde is working, and now serendipity is serving nothing but blank pages. A look at the source shows nothing but a blank HTML document.
All other php pages on the server seem to work fine and a test file with phpinfo works from the serendipity install point.
I've deleted everything including the database and tried a fresh install and even downloaded the latest snapshot. What am I missing?