What Corion said and this is a nice snippet to help with the issue- 

  builder {
      enable "Rewrite", rules => sub {
          return 204 if $_ eq "/favicon.ico";
      };
      enable "Session";
      $app;
  };

[download]

You might need to cpanm Plack::Middleware::Rewrite first; Plack::Middleware::Rewrite.

In reply to Re: Plack::Session problem by Your Mother
in thread Plack::Session problem by Logicus

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