diff -ur nginx-0.7.65/src/http/ngx_http_upstream.c nginx-0.7.65-patched/src/http/ngx_http_upstream.c
--- nginx-0.7.65/src/http/ngx_http_upstream.c	2010-02-01 23:46:14.000000000 +0800
+++ nginx-0.7.65-patched/src/http/ngx_http_upstream.c	2010-06-03 12:11:29.925761199 +0800
@@ -363,8 +363,6 @@
 
     if (u && u->cleanup) {
         ngx_http_upstream_cleanup(r);
-        *u->cleanup = NULL;
-        u->cleanup = NULL;
     }
 
     u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));