yes we have some changes.

#6 0x01019ee7 in ngx_spawn_process (cycle=0x1050028,
proc=0x101b89c <ngx_worker_process_cycle>, data=0x0,
name=0x1030d3e "worker process", respawn=Cannot access memory at address 0xffffdbf8

what does this mean? is this similar to http://nginx.org/pipermail/nginx-ru/2009-October/029210.html

i can give you the dumps of any variables you would like us to examine.

thanks again for your help