Mikrotik V5.19

What’s new in 5.19 (2012-Jul-16 10:51):

*) ssh – added /ip ssh regenerate-host-key which will regenerate current host key;
*) dhcpv6 client – fix multiple advertise handling;
*) snmp – fix v3 engineID discovery;
*) fix ticking sound on RB411UAHL;
*) user manager – fixed byte to KiB, MiB and GiB conversion
(digit after decimal point was incorectly calculated);
*) fix routerboard firmware upgrade on RB951-2n;
*) sniffer/torch + simple queues sometimes could crash router;

I do believe I remember seeing that if you were having any wacky RB2011 issues that this version should fix you up.