White screen on front page only

Question

I've got the famous white screen, but only on my home page. Deeper pages load just fine. I moved my themes directory to themes-old and made a new themes directory that only has twentyten in it. I changed my theme to twenty ten. I don't have any plugins enabled, but I moved my plugins directory and created a new, empty plugins directory.

I turned debugging on.

I'm at a total loss here. I did make some theme tweaks today, but I already restored the back up of my theme which didn't help, and anyway I've now set twentyten as my theme.

Answer 1

To make sure that the index.php will be loaded first add the following line to your .htaccess:

DirectoryIndex index.php index.html

This tells Apache to ignore an index.html if an index.php exists.

Answer 2

Because I somehow dropped a file called "index.html" in my WordPress install.

How'd I find out? I created a completely fresh installation and used diff to compare them.