nginx memcached module and strange characters

[Nanyang Zhan]

I have tried nginx/0.6.32, but this didn't fix the problem.
I used:
ruby 1.8.7 (2008-06-20 patchlevel 22) [i686-linux] and
ruby 1.8.7 (2008-06-20 patchlevel 22) [i686-darwin9]
with
memcached 1.2.5
libmemcached 0.22
memcached gem 0.11
or
memcached-client 1.5.0

here is my nginx conf file:
worker_processes  1;
pid        /www/logs/nginx.pid;
events {
    worker_connections  1024;
}
http {
    server {
        listen       80;
        server_name  localhost;
        location / {
          default_type text/html;
          set $memcached_key $uri;
          memcached_pass localhost:11211;
        }
    }
}

after I setup a cache:
irb(main):002:0> require 'memcached'
=> true
irb(main):003:0> c = Memcached.new('localhost:11211')
#...
irb(main):006:0> c.set '/test', 'hello'

when I opened 127.0.0.1/test with safari 3.0 or Firefox 3, I got:
"hello

I get no idea where the Quotation mark coming from!!!!! Can anyone tell 
me how to fix it?

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