Conflicting PHP file with same name as Page slug.

[Kafkaesqui]

If a php file residing in the root directory of the weblog (with wp-blog-header.php, etc.) has a filename matching that of an existing Page slug, WordPress uses that PHP file instead of the default, theme or custom template. For example, the file "about.php" loads when accessing the "about" Page.

[Kafkaesqui]

After a bit more testing I see this is not just an issue with PHP files. It seems any file type will do it (tried about.txt, about.doc and about.jpg!), as long as it's using the same filename.

[ryan]

The default rewrite rules purposefully avoid eclipsing files that exist in the filesystem by checking to see if %{REQUEST_FILENAME} exists. Perhaps mod_rewrite resolves this to any file with a matching basename, regardless of extension.

[markjaquith]

Sounds like Options +MultiViews

Solution: turn that off, or rename your files so they don't conflict!