What's new in 5.10 (2011-Dec-09 11:49):

*) snmp - provide extended interface statistics when availabe;
*) dhcpv6 client - use link-scoped multicast address;
*) dhcp client - renew dhcp lease on ethernet link up event;
*) ipv6 gre tunnel added (/interface gre6) supports ip and ipv6 encapsulation;
*) ip gre tunnel supports ipv6 encapsulation;
*) allow setting bigger trafflow cache;
*) improved RB1200 stability when using ether9,ether10;
*) fixed RB1200 stability issues when using crypto hardware acceleration;