What could cause a line in access.log like the following? [13/Jul/2006:20:55:04 +0000] "GET http://p.foo.net/ph/31/1/38/mlasw87/1151964243_t.jpg HTTP/1.0" 504 510 TCP_REFRESH_MISS:NONE The object in question should be cacheable for a long time (Expires is set to 5 years), and it's caching fine, and I have ignore_reload turned on, so that clients can't force a refresh. And there's that 504 Gateway Timeout, even though I can curl the URL with no problem. Squid is configured as part of a cache hierarchy -- might that cause the problem? It has three siblings and three children (who are also the children of its siblings). Thanks in advance! Lawrence
