header problem

Hello, 

I have a problem with last modified headers in oscache. 
All the images on my website are database images. Because I won't query the database for the same images, I have made a filter and mapping in my web.xml. 

  <filter> 
    <filter-name>Set Image Cache</filter-name> 
    <filter-class>com.opensymphony.oscache.web.filter.CacheFilter</filter-class> 
  </filter> 
  <filter-mapping> 
    <filter-name>Set Image Cache</filter-name> 
    <url-pattern>/db.images/*</url-pattern> 
  </filter-mapping> 

This works fine. But the last modified header are only showed at the first request. So,  browsers couldn't cache my images. 

First time: 
HTTP/1.x 200 OK 
Last-Modified: Fri, 05 Dec 2003 09:54:02 GMT 
Date: Fri, 05 Dec 2003 09:54:02 GMT 
content-disposition: inline; filename="tv portal.jpeg" 
Expires: Sat, 06 Dec 2003 09:54:02 GMT 
Content-Type: image/jpeg 
Content-Length: 23182 
Server: Apache Coyote/1.0 
Connection: keep-alive 

Second time: 
HTTP/1.x 200 OK 
Content-Type: image/jpeg 
Content-Length: 23182 
Date: Fri, 05 Dec 2003 09:54:02 GMT 
Server: Apache Coyote/1.0 
Connection: keep-alive 


What's the problem here? 

----
Sander

http://jira.opensymphony.com/secure/ViewIssue.jspa?key=CACHE-70