[8.165][BUG][FIXED] middleware Netfilter's connection tracking error

Hi All

I am getting the following errors since yesterday

2011:06:01-01:46:35 *****  middleware[5156]: >=========================================================================

2011:06:01-01:46:35 *****  middleware[5156]: E Deletion of udp conntrack 86.173.106.79:55276 192.12.94.30:53 failed!

2011:06:01-01:46:35 *****  middleware[5156]: 

2011:06:01-01:46:35 *****  middleware[5156]:  1. modules::iptables:[:D]oConntrackFlush:321() /modules/iptables.pm

2011:06:01-01:46:35 *****  middleware[5156]:  2. modules::IPTables::Adapters::nat_masq::generateRules:307() /modules/IPTables/Adapters/nat_masq.pm

2011:06:01-01:46:35 *****  middleware[5156]:  3. modules::IPTables::Adapter::load:60() /modules/IPTables/Adapter.pm

2011:06:01-01:46:35 *****  middleware[5156]:  4. core::Config::load:276() /core/Config.pm

2011:06:01-01:46:35 *****  middleware[5156]:  5. main::top-level:199() mdw.pl

2011:06:01-01:46:36 *****  middleware[5156]: |=========================================================================

2011:06:01-01:46:36 *****  middleware[5156]: E Deletion of udp conntrack 86.173.106.79:6684 192.54.112.30:53 failed!

2011:06:01-01:46:36 *****  middleware[5156]: 

2011:06:01-01:46:36 *****  middleware[5156]:  1. modules::iptables:[:D]oConntrackFlush:321() /modules/iptables.pm

2011:06:01-01:46:36 *****  middleware[5156]:  2. modules::IPTables::Adapters::nat_masq::generateRules:307() /modules/IPTables/Adapters/nat_masq.pm

2011:06:01-01:46:36 *****  middleware[5156]:  3. modules::IPTables::Adapter::load:60() /modules/IPTables/Adapter.pm

2011:06:01-01:46:36 *****  middleware[5156]:  4. core::Config::load:276() /core/Config.pm

2011:06:01-01:46:36 *****  middleware[5156]:  5. main::top-level:199() mdw.pl

2011:06:01-01:46:36 *****  middleware[5156]: |=========================================================================

2011:06:01-01:46:36 *****  middleware[5156]: E Deletion of udp conntrack 86.173.106.79:17966 192.26.92.30:53 failed!

2011:06:01-01:46:36 *****  middleware[5156]: 

2011:06:01-01:46:36 *****  middleware[5156]:  1. modules::iptables:[:D]oConntrackFlush:321() /modules/iptables.pm

2011:06:01-01:46:36 *****  middleware[5156]:  2. modules::IPTables::Adapters::nat_masq::generateRules:307() /modules/IPTables/Adapters/nat_masq.pm

2011:06:01-01:46:36 *****  middleware[5156]:  3. modules::IPTables::Adapter::load:60() /modules/IPTables/Adapter.pm

2011:06:01-01:46:36 *****  middleware[5156]:  4. core::Config::load:276() /core/Config.pm

2011:06:01-01:46:36 *****  middleware[5156]:  5. main::top-level:199() mdw.pl

2011:06:01-01:46:37 *****  middleware[5156]: |=========================================================================

2011:06:01-01:46:37 *****  middleware[5156]: E Deletion of udp conntrack 86.173.106.79:25255 192.43.172.30:53 failed!

2011:06:01-01:46:37 *****  middleware[5156]: 

2011:06:01-01:46:37 *****  middleware[5156]:  1. modules::iptables:[:D]oConntrackFlush:321() /modules/iptables.pm

2011:06:01-01:46:37 *****  middleware[5156]:  2. modules::IPTables::Adapters::nat_masq::generateRules:307() /modules/IPTables/Adapters/nat_masq.pm

2011:06:01-01:46:37 *****  middleware[5156]:  3. modules::IPTables::Adapter::load:60() /modules/IPTables/Adapter.pm

2011:06:01-01:46:37 *****  middleware[5156]:  4. core::Config::load:276() /core/Config.pm

2011:06:01-01:46:37 *****  middleware[5156]:  5. main::top-level:199() mdw.pl

2011:06:01-01:46:38 *****  middleware[5156]: |=========================================================================

2011:06:01-01:46:38 *****  middleware[5156]: E Deletion of udp conntrack 86.173.106.79:9021 192.54.112.30:53 failed!

2011:06:01-01:46:38 *****  middleware[5156]: 

2011:06:01-01:46:38 *****  middleware[5156]:  1. modules::iptables:[:D]oConntrackFlush:321() /modules/iptables.pm

2011:06:01-01:46:38 *****  middleware[5156]:  2. modules::IPTables::Adapters::nat_masq::generateRules:307() /modules/IPTables/Adapters/nat_masq.pm

2011:06:01-01:46:38 *****  middleware[5156]:  3. modules::IPTables::Adapter::load:60() /modules/IPTables/Adapter.pm

2011:06:01-01:46:38 *****  middleware[5156]:  4. core::Config::load:276() /core/Config.pm

2011:06:01-01:46:38 *****  middleware[5156]:  5. main::top-level:199() mdw.pl

Thanks