Lighttpd

I'm running lighttpd on my ubuntu 7.10 box. My website is file hosting that send file via x-sendfile. I've some problem about async-read that NULL bytes appears in downloader in sometime.

network_linux_aio.c.67: (trace) async-read failed with -14 (Bad address), was asked for /404.php (fd = 1409)

network_linux_aio.c.67: (trace) async-read failed with -14 (Bad address), was asked for /404.php (fd = 717)

network_linux_aio.c.67: (trace) async-read failed with -14 (Bad address), was asked for /404.php (fd = 742)

network_linux_aio.c.67: (trace) async-read failed with -14 (Bad address), was asked for /404.php (fd = 1402)

network_linux_aio.c.67: (trace) async-read failed with -14 (Bad address), was asked for /404.php (fd = 778)