Astaro rebooted for unknown reason

Hi. I have an instance running (on AWS) and today it rebooted without a known reason. Below are system logs at that time... any ideas?
Ver 8.300


2012:02:24-12:00:01 107 /usr/sbin/cron[13502]: (root) CMD ( /usr/local/bin/reporter/system-reporter.pl)
2012:02:24-12:00:01 107 /usr/sbin/cron[13503]: (root) CMD (nice -n19 /usr/local/bin/create_rrd_graphs.plx)
2012:02:24-12:00:01 107 /usr/sbin/cron[13504]: (root) CMD ( /var/chroot-httpd/var/webadmin/extra/ash.plx)
2012:02:24-12:00:01 107 /usr/sbin/cron[13505]: (root) CMD ( /var/chroot-httpd/var/webadmin/extra/feed_fetcher.plx)
2012:02:24-12:00:01 107 syslog-ng[548]: Log statistics; processed='destination(d_MY.PUBLIC.IP.ADDY_ipv60)= 0', processed='destination(d_MY.PUBLIC.IP.ADDY_named0) =624', processed='center(received)=0', dropped='dst.program(d_adminrr#0,/usr/local/bin/reporter/admin-reporter.pl)=0', processed='dst.program(d_adminrr#0,/usr/local/bin/reporter/admin-reporter.pl)=7523', stored='dst.program(d_adminrr#0,/usr/local/bin/reporter/admin-reporter.pl)=0', processed='src.internal(s_local_asl#1)=2049', stamp='src.internal(s_local_asl#1)=1330083961', processed='destination(d_MY.PUBLIC.IP.ADDY_sockd0) =0', processed='destination(d_MY.PUBLIC.IP.ADDY_wireles s0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_red0)=0 ', processed='destination(d_MY.PUBLIC.IP.ADDY_identd0 )=0', processed='destination(d_MY.PUBLIC.IP.ADDY_sshd0)= 5', processed='destination(d_devnull)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_notifie r0)=389', processed='destination(d_adminrr)=27000', processed='destination(d_MY.PUBLIC.IP.ADDY_system0 )=36391', processed='destination(d_mailsecrr)=130118', processed='destination(d_MY.PUBLIC.IP.ADDY_confd-debug0)=829956', dropped='dst.program(d_mailsecrr#0,/usr/local/bin/reporter/mailsec-reporter.pl)=0', processed='dst.program(d_mailsecrr#0,/usr/local/bin/reporter/mailsec-reporter.pl)=130118', stored='dst.program(d_mailsecrr#0,/usr/local/bin/reporter/mailsec-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_rasupda te0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_mdw0)=3 35', processed='destination(d_vpnrr)=4523', processed='destination(d_MY.PUBLIC.IP.ADDY_mdw-debug0)=1012', processed='destination(d_MY.PUBLIC.IP.ADDY_fallbac k0)=10', processed='destination(d_MY.PUBLIC.IP.ADDY_pptpd0) =0', dropped='dst.program(d_pcktrr#0,/usr/local/bin/reporter/pfilter-reporter.pl)=0', processed='dst.program(d_pcktrr#0,/usr/local/bin/reporter/pfilter-reporter.pl)=6375', stored='dst.program(d_pcktrr#0,/usr/local/bin/reporter/pfilter-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_accd0)= 0', processed='destination(d_MY.PUBLIC.IP.ADDY_dhcpd0) =0', processed='destination(d_MY.PUBLIC.IP.ADDY_confd0) =222', processed='destination(d_MY.PUBLIC.IP.ADDY_acm0)=0 ', processed='destination(d_websecrr)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_smtp0)= 130118', processed='destination(d_MY.PUBLIC.IP.ADDY_user_pr efetch0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_http0)= 0', processed='center(queued)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_pppd0)= 0', processed='destination(d_pcktrr)=6375', processed='destination(d_ipsrr)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_kernel0 )=6', processed='destination(d_MY.PUBLIC.IP.ADDY_xorp0)= 0', processed='destination(d_MY.PUBLIC.IP.ADDY_httpd0) =49213', processed='destination(d_MY.PUBLIC.IP.ADDY_high-availability0)=0', dropped='dst.program(d_wafrr#0,/usr/local/bin/reporter/waf-reporter.pl)=0', processed='dst.program(d_wafrr#0,/usr/local/bin/reporter/waf-reporter.pl)=0', stored='dst.program(d_wafrr#0,/usr/local/bin/reporter/waf-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_ipsec0) =4535', processed='destination(d_MY.PUBLIC.IP.ADDY_endpoin t0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_u2dcach e0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_ftp0)=0 ', processed='destination(d_MY.PUBLIC.IP.ADDY_afc0)=0 ', processed='destination(d_MY.PUBLIC.IP.ADDY_aua0)=9 ', processed='destination(d_MY.PUBLIC.IP.ADDY_epsecd0 )=0', dropped='dst.program(d_vpnrr#0,/usr/local/bin/reporter/vpn-reporter.pl)=0', processed='dst.program(d_vpnrr#0,/usr/local/bin/reporter/vpn-reporter.pl)=4523', stored='dst.program(d_vpnrr#0,/usr/local/bin/reporter/vpn-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_pppoe0) =0', processed='destination(d_MY.PUBLIC.IP.ADDY_reverse proxy0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_pppoa0) =0', processed='destination(d_MY.PUBLIC.IP.ADDY_logging 0)=315', dropped='dst.program(d_websecrr#0,/usr/local/bin/reporter/websec-reporter.pl)=0', processed='dst.program(d_websecrr#0,/usr/local/bin/reporter/websec-reporter.pl)=0', stored='dst.program(d_websecrr#0,/usr/local/bin/reporter/websec-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_openvpn 0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_device-agent0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_up2date 0)=26763', processed='destination(d_MY.PUBLIC.IP.ADDY_ips0)=0 ', processed='destination(d_MY.PUBLIC.IP.ADDY_qa-logging0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_webadmi n0)=94242', processed='destination(d_MY.PUBLIC.IP.ADDY_selfmon 0)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_ospf0)= 0', processed='destination(d_MY.PUBLIC.IP.ADDY_packetf ilter0)=6375', dropped='dst.program(d_ipsrr#0,/usr/local/bin/reporter/ips-reporter.pl)=0', processed='dst.program(d_ipsrr#0,/usr/local/bin/reporter/ips-reporter.pl)=0', stored='dst.program(d_ipsrr#0,/usr/local/bin/reporter/ips-reporter.pl)=0', processed='destination(d_MY.PUBLIC.IP.ADDY_nnd0)=0 ', processed='source(s_local_asl)=1179964', processed='destination(d_MY.PUBLIC.IP.ADDY_pop30)= 0', processed='destination(d_MY.PUBLIC.IP.ADDY_login0) =1', processed='destination(d_MY.PUBLIC.IP.ADDY_service _monitor0)=0', processed='destination(d_wafrr)=0'
2012:02:24-12:01:01 107 /usr/sbin/cron[13658]: (root) CMD (/sbin/audld.plx --nosys --trigger)
2012:02:24-12:01:02 107 syslog-ng[548]: POLLERR occurred while idle; fd='81'
2012:02:24-12:01:57 107 daemon-watcher[4179]: Watching selfmonng.plx - running fine
2012:02:24-12:02:01 107 /usr/sbin/cron[13685]: (root) CMD ( nice -n19 /usr/local/bin/gen_inline_reporting_data.plx)
2012:02:24-12:11:24 107 syslog-ng[3241]: syslog-ng starting up; version='3.0.10'
2012:02:24-12:11:35 107 sysmond[3593]: sysmond 0.00 starting
2012:02:24-12:11:35 107 sysmond[3593]: daemonizing
2012:02:24-12:11:38 107 count_active_ip[3792]: count_active_ip: checking active IP addresses
2012:02:24-12:11:38 107 count_active_ip[3792]: Unlimited License - no counting needed
2012:02:24-12:11:39 107 /usr/sbin/cron[3883]: (CRON) STARTUP (V5.0)