mod_gzip with php

[Roman Vasilyev]

Hello,

I found strange behavior for php scripts.
when server request is HEAD, I can see some garbage in response.
=========================
HEAD /server.php HTTP/1.1
Host: www.rss2search.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.6) 
Gecko/20100625 Firefox/3.6.6
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Content-Length: 0
Content-Type: text/plain; charset=UTF-8

HTTP/1.1 200 OK
Server: nginx/0.8.39
Date: Wed, 30 Jun 2010 20:00:33 GMT
Content-Type: text/html
Connection: keep-alive
X-Powered-By: PHP/5.1.6
P3P: CP="NOI ADM DEV PSAi COM NAV OUR OTR STP IND DEM"
Content-Encoding: gzip

....................
this noneprintable bytes is: 1F8B080000000000000303000000000000000000

Helped to fix that disabling mod_gzip for HEAD requests in fastcgi.conf.
     if ( $request_method = HEAD ) {
       gzip off;
     }

Is this behavior expectible, if so, what best way for nginx.conf to fix 
this problem?

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