nginx 0.5.35 *) Change: now the ngx_http_userid_module adds start time microseconds to the cookie field contains a pid value. *) Change: now the uname(2) is used on Linux instead of procfs. Thanks to Ilya Novikov. *) Feature: the "If-Range" request header line support. Thanks to Alexander V. Inyukhin. *) Bugfix: in HTTPS mode requests might fail with the "bad write retry" error; bug appeared in 0.5.13. *) Bugfix: the STARTTLS in SMTP mode did not work. Thanks to Oleg Motienko. *) Bugfix: large_client_header_buffers did not freed before going to keep-alive state. Thanks to Olexander Shtepa. *) Bugfix: the "limit_rate" directive did not allow to use full throughput, even if limit value was very high. *) Bugfix: the $status variable was equal to 0 if a proxied server returned response in HTTP/0.9 version. *) Bugfix: if the "?" character was in a "error_page" directive, then it was escaped in a proxied request; bug appeared in 0.5.32.

--- a/src/http/modules/ngx_http_not_modified_filter_module.c
+++ b/src/http/modules/ngx_http_not_modified_filter_module.c
@@ -70,7 +70,7 @@ ngx_int_t ngx_http_not_modified_header_f
      * I think that the equality of the dates is correcter
      */
 
-    if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) {
+    if (ims == r->headers_out.last_modified_time) {
         r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
         r->headers_out.content_type.len = 0;
         ngx_http_clear_content_length(r);