> If you have a (simple) testcase that demonstrates the 
> problem I'd be happy to take a look at it.

##</code><code>##

# ==============================================================================
# SERVER IMPLEMENTATION
# exec: perl src.pl
# ==============================================================================

#!/usr/bin/perl -w

# ==============================================================================

use strict;

use POE qw(Session);
use POE::Component::IKC::Server;
use POE::Component::IKC::Specifier;

use threads;

# ==============================================================================

my $port  = '32032';
my $ip    = '127.0.0.1';
my $name  = 'ThreadTest';
my $alias = 'TT';

# === INTER KERNEL COMMUNICATION ===============================================

create_ikc_server( ip => $ip, port => $port, name => $name );

POE::Session -> new
(
    # --- general states ---------------------------------------------------
    _start              => \&start,               # session start
    # --- service requests -------------------------------------------------
    'call'              => \&call,
    # ----------------------------------------------------------------------
);

$poe_kernel->run();

# === IKC STATES ===============================================================

sub start
{
    my($kernel, $heap) = @_[KERNEL, HEAP];
    print "State [start]\n";

    $kernel -> alias_set( $alias );
    $kernel -> call( 'IKC', 'publish',  $alias,
        [
            qw(
                call
            )
        ]
    );
}

# ==============================================================================

sub call
{
    my($kernel, $heap, $param) = @_[KERNEL, HEAP, ARG0];
    print "State [call]\n";
    async
    {
    } -> detach;
    return [ ];
}

# ==============================================================================

__END__

##</code><code>##

# ==============================================================================
# CLIENT IMPLEMENTATION
# exec: perl cln.pl
# ==============================================================================

#!/usr/bin/perl -w

# ==============================================================================

use strict;

use POE qw( Session );
use POE::Component::IKC::Client;
use POE::Component::IKC::Responder;

# ==============================================================================

my $ip     = '127.0.0.1';
my $port   = '32032';
my $myName = $$;

# ==============================================================================

create_ikc_client(
    ip        => $ip,
    port      => $port,
    name      => $myName,
    subscribe => [ "poe://ThreadTest/TT" ],
);

POE::Session -> new
(
    _start              => \&start,
    remoteSubscribe     => \&remoteSubscribe,
    runTestDone         => \&runTestDone,
);

$poe_kernel -> run;

# === IKC STATES ===============================================================

sub start
{
    my ($self, $kernel, $heap) = @_[ OBJECT, KERNEL, HEAP ];
    print "State [start]\n";
    create_ikc_responder();
    $kernel -> alias_set( 'test' );
    $kernel -> post( 'IKC', 'publish', 'test',
        [
            qw(
                runTestDone
            )
        ]
    );
    $kernel -> post( 'IKC', 'monitor', 'ThreadTest',
        {
            subscribe   => 'remoteSubscribe',
        }
    );
}

# ==============================================================================

sub remoteSubscribe
{
    my ($kernel, $heap, $name, $real_name, $what) = @_[ KERNEL, HEAP, ARG0, ARG1, ARG4 ];
    print "State [remoteSubscribe]\n";
    return unless $real_name eq 'ThreadTest';

    $kernel -> alias_set( 'test' );
    $kernel -> post( 'IKC',
        'call', "poe://ThreadTest/TT/call",
        [ $kernel -> ID ], 'poe:runTestDone'
    );
}

# ==============================================================================

sub runTestDone
{
    my ($kernel, $heap, $rData, $session) = @_[ KERNEL, HEAP, ARG0, SESSION ];
    print "State [runTestDone]\n";
    $kernel -> call( 'IKC', 'retract', 'test' );
    $kernel -> alias_remove( 'test' );
    $kernel -> post( IKC => 'shutdown' );
    $kernel -> yield( 'shutdown' );
}

# ==============================================================================

__END__