Long-term Expires header is only 8 hours

bash$ curl -i http://localhost:8080/s/620/1/1.0/_/download/batch/jira.webresources:autocomplete/jira.webresources:autocomplete.css

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
X-AREQUESTID: 618x208x1
Expires: Wed, 15 Jun 2011 09:03:52 GMT
Cache-Control: max-age=31536000
Cache-Control: public
Last-Modified: Wed, 15 Jun 2011 00:11:18 GMT
ETag: "1308096678000"
Content-Type: text/css;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 15 Jun 2011 00:18:16 GMT