I have used the predefined image styles (thumbnail, medium, etc.) within views. As a result, I note that with a file path for node attachments of styles/default/files/field/image, the styled image exists in styles/default/files/styles/medium/field/image. So now, I am inserting a php snippet into a block, to make use of a styled image. The api says that the path should be relative to the files path. My call is: theme_image_style(array('style_name' => 'medium','path' => 'field/image/myimage.png','alt' => 'text')); The resulting HTML is <img typeof="foaf:Image" src="http://mydomain.com/image/generate/medium//" alt="text" /> so, I assume that /image is a callback url rather than something that should exist in the file system. If not, that's the first issue. Then, the /medium// seems to be missing the file name. Thanks! Jeff