Hi, I'm hosting a few images - where I'm required to dynamically watermark them. I achieve this by using mod_rewrite to rewrite the URL to a php page: RewriteRule ^(.*)\.jpg$ watermark.php?filename=$1.jpg Code (markup): watermark.php just grabs the image and applies a quick watermark. All works fine, but I've noticed that apache gives slightly different headers: Header for a "real" image: Date: Thu, 25 Oct 2007 21:38:10 GMT Server: Apache/2.2.4 (Ubuntu) PHP/5.2.3-1ubuntu6 Last-Modified: Mon, 15 Oct 2007 02:52:51 GMT Etag: "1a6888-430c-2a0f46c0" Accept-Ranges: bytes Content-Length: 17164 Content-Type: image/jpeg 200 OK Code (markup): Headers for a dynamic image: Date: Thu, 25 Oct 2007 21:37:38 GMT Server: Apache/2.2.4 (Ubuntu) PHP/5.2.3-1ubuntu6 X-Powered-By: PHP/5.2.3-1ubuntu6 Keep-Alive: timeout=15, max=99 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: image/jpeg 200 OK Code (markup): The problem is, with the headers from the dynamic image - web browsers are not caching the images. And it's quite important in my site - that they do. Anyway I can get Apache to output the headers just like it would for a static image? Thanks. Eric.