nginx segfault

[cray]

Периодически появляются следующие ошибки:

xserv:/var/log# grep nginx /var/log/messages
Jun  3 16:55:56 xserv kernel: nginx[12535]: segfault at 00000014 eip 0805e6d5 esp bfa37b60 error 6
Jun  3 19:18:04 xserv kernel: nginx[13458]: segfault at 000001a4 eip 08079f87 esp bfa37ba0 error 4
Jun  3 20:09:48 xserv kernel: nginx[13456]: segfault at 00000000 eip 0804ce5f esp bfa37ab0 error 4
xserv:/var/log# grep '20:09:48' /var/log/nginx/error.log
2008/06/01 20:09:48 [error] 3478#0: *9785550 directory index of "/home/blablabla/htdocs/images/" is forbidden, client: xxx.xxx.xxx.xxx, server: blablabla.org, request: "GET /images/ HTTP/1.1", host: "blablabla.org", referrer: "http://blablabla.org/"
2008/06/03 20:09:48 [error] 13456#0: *21890783 upstream sent too big header while reading response header from upstream, client: xxx.xxx.xxx.xxx server: blablabla.org, request: "GET /parse.php?sid=d7b6c21f351510c5910af54f2bc7e083 HTTP/1.1", upstream: "fastcgi://unix:/tmp/php.sock:", host: "blablabla.org"
2008/06/03 20:09:48 [alert] 13456#0: *21890783 recv() failed (95: Operation not supported) while reading response header from upstream, client: xxx.xxx.xxx.xxx, server: 0.0.0.0:80
2008/06/03 20:09:48 [alert] 3472#0: worker process 13456 exited on signal 11
2008/06/03 20:09:48 [error] 24328#0: *21891995 directory index of "/home/blablabla/htdocs/images/" is forbidden, client: xxx.xxx.xxx.xxx, server: blablabla.org, request: "GET /images/ HTTP/1.1", host: "blablabla.org", referrer: "http://blablabla.org/"

nginx 0.6.31
debian etch, kernel 2.6.24.3

насколько я понимаю проблема не критическая, но интересует почему nginx не может нормально обработать ошибку с парсингом больших хидеров?

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