I've recently started getting the following error message from Apache::Request: [libapreq] unknown content-type: `(null)' These are all POSTs. Looking at the libapreq code, it seems like only a broken browser that doesn't send the content-type header with POST requests would cause this, but the user agents are usually later versions of IE or Netscape. This only shows up once every few hundred thousand pages, which makes it hard to track down. Any ideas? Thanks, Chris