server_name in virtual host file does not take > 15 characters domain name

[jarek]

Hi

I use nginx on ubuntu server 9.04

in sites-available I have 1 file for each domain everything worked
fine until today when I have added 1 domain.
If I have a domain that have up to 15 characters incl dots like
xxxxxxxxxxxx.xx   it will work: but if it excid 15 characters after
the restart of nginx all my domains will stop to respond

 server {
        listen 87.98.190.175:80;
        server_name xxxxxxxxxxxx.xx;

does work

 server {
        listen 87.98.190.175:80;
        server_name xxxxxxxxxxxx.xxx;

does not

Can anyone help?