nginx 0.1.30 *) Bugfix: the worker process may got caught in an endless loop if the SSI was used. *) Bugfix: the response encrypted by SSL may not transferred complete. *) Bugfix: if the length of the response part received at once from proxied or FastCGI server was equal to 500, then nginx returns the 500 response code; in proxy mode the bug appeared in 0.1.29 only. *) Bugfix: nginx did not consider the directives with 8 or 9 parameters as invalid. *) Feature: the "return" directive can return the 204 response code. *) Feature: the "ignore_invalid_headers" directive.

--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -779,12 +779,6 @@ ngx_http_upstream_process_header(ngx_eve
         return;
     }
 
-    if (n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
-        ngx_http_upstream_finalize_request(r, u,
-                                           NGX_HTTP_INTERNAL_SERVER_ERROR);
-        return;
-    }
-
     u->header_in.last += n;
 
 #if 0