What's new in 4.17 (2011-Mar-02 10:53):

*) fixed occasional print command stalling when lots of items;
*) fixed RB1100 ether11,12,13 and RB800 ether3 resetting problem;
*) implemented usb power-reset command on RB SXT 5HnD;
*) wireless-nv2 package now includes the same fixes as RouterOS v5rc11;

What's new in 4.16 (2010-Dec-20 10:21):

*) fixed problem - could not update license for
   old style 7 digit software-id's;

What's new in 4.15 (2010-Dec-13 12:37):

*) upgraded broken RB1000 bootloader which was included with v4.14;

What's new in 4.14 (2010-Dec-10 12:07):

*) radius - fixed Disconnect and CoA response signature generation;
*) radius - do not include NAS-Identifier & NAS-IP-Address in
   Disconnect and CoA responses;
*) added hotspot html variable "host-ip";
*) wireless nv2 - fixed station-wds mode multicast problem;
*) wireless nv2 - fixed occasional encrypted link stalls;

What's new in 4.13 (2010-Nov-01 14:48):

*) added USB power reset feature;
*) added support for nv2 in wireless-nv2 package;

What's new in 4.12 (2010-Oct-25 10:35):

*) added support for RB493G;

What's new in 4.11 (2010-Jul-26 10:16):

*) changed "wireless registration table entry count" snmp oid to 1.3.6.1.4.1.14988.1.1.1.4.0;
*) fix 5&10MHz channel support for 11n cards;

What's new in 4.10 (2010-May-28 13:59):

*) added support for ethernet switch configuration in WinBox;
*) allow to configure 11n wireless rate tx powers in WinBox;
*) dhcp server - show non-printable option 82 agent-circuit-id and
   agent-remote-id values in hexadecimal notation also in winbox;
*) api - fixed '/ip/route/print', was not showing '.id' values;
*) console - fixed printing of OID values;
*) lcd - added support for AX89063

What's new in 4.9:

*) fixed problem - some of the bridge ports stayed invalid after reboot;
*) console - added '/port remote-access export' command;

What's new in 4.8:

*) added support for second serial port on RB800/RB1100;
*) fixed problem - WinBox crashed while opening VAP interface;
*) dhcp server - fixed possible inactive dhcp server in case of many
   dhcp leases with address-pool enabled (broken in v4.7);
*) dhcp server - show non-printable option 82 agent-circuit-id and
   agent-remote-id values in hexadecimal notation
   (in the same way as client-id is shown);
*) api - can supply password to '/system/upgrade/upgrade-package-source/add';
*) console - fixed bug that caused "cannot set ..." error when using
    some properties in 'find' commands;
*) api - 'print' command was not showing values of some properties
    such as 'servers' in "/ip/dns";
*) show old software id in export file header;

What's new in 4.7:

*) fixed problem - wireless packet bridging with nstreme enabled
   sometimes was very slow on RB1xx, RB5xx and RB4xx;
*) fixed problem - ipv6 traffic was not bridged if ipv6 package was not enabled;
*) '/user active' now lists type of api connections as 'api'  
*) fixed getting interface stats in dude
*) fixed metarouter stability problem on RB400s & RB750s;
*) fixed metarouter - it didn't work on RB1000 with 2Gb;
*) fixed metarouter - it locked up on RB800;
*) fixed problem - SFQ queues did not work on interfaces (wireless) if none
   of simple or tree queues were added;
*) fixed RB800 temperature;
*) silentboot feature updated;
*) multicast - fixed possible crash during PIM startup;
*) ospf - changed "/routing ospf route" to show type 2 metric instead of
    internal metric for type 2 external routes;
*) report platform name in "/sysrem resource";
*) fixed problem - vlans were not working on RB750 ether1;
*) fixed mac address handling on RB750, some specific arp requests did not work;
*) more than two dns servers allowed in /ip dns;
*) sniffer and torch could process packet from other interfaces;
*) dns cache rotates order of records in reply messages;
*) ospf - fixed DR and BDR election;

What's new in 4.6:

*) only accept dotted decimal notation for IP addresses. Use of numbers
    with leading zero, numbers larger than 255 and non-decimal numbers
    is not accepted (but still can ommit third or second and third numbers,
    if they are zero);
*) email - user must enable tls explicitly
*) remove limit on number of multicast enabled interfaces, maximum was 32;
*) dhcp server - show last-seen time for leases;
*) dhcp server - do not create busy lease if client declines all IP addresses;
*) fixed - when closing winbox terminal window with active serial-terminal
    console command, serial port sometimes was left in acquired state;

What's new in 4.5:

*) ipsec - added blowfish, twofish, and camellia encryption algorithms;
*) fixed static route removing;
*) fixed DHCP client compatibility with some DHCP servers;
*) added static multi-cast route support;
*) fixed temperature monitor on RB800 and RB450G;
*) user manager - payment bug fix - now able to buy 
   credits without extend price specified;

What's new in 4.4:

*) snmp - fixed snmp version three;
*) snmp - fixed vlan interface speed;
*) hotspot - fixed radius variables in hotspot html pages;
*) removed support for xen;
*) routing - added support for BFD protocol;
*) fixed problem - MetaROUTER sometimes froze on RB4xx;
*) fixed OSPFv3 on bridge interfaces;

What's new in 4.3:

*) kvm - vnc support, booting from cdrom image
*) API - fixed possible crash when running concurrent commands;
*) console - fixed logging commands: 'warning', 'error' and 'debug' were
    all using 'info' topic;
*) bgp - added routing-table configuration option for instances;
*) bgp - added 'as-override' and 'passive' configuration options for peers;
*) bgp - added support for Site of Origin extended communities;
*) bgp - fixed some network issues;
*) ospf - fixed problem: when last neighbor on multi-access interface disappeared,
   incorrect RouterLSA was generated on designated router;
*) metarouter - allow to specify metarouter's memory size when importing image;
*) firewall - added 'routing-table' matcher;
*) fixed problem - e1000 driver did not work in virtual machines;

What's new in 4.2:

*) fixed problem - RB450G ethernet did not work if one of the ports was disabled;
*) fixed ethernet of RB433 with switch chip IP175D;
*) fixed route attribute problem;
*) fixed route next-hops falling under multiple connected routes;

What's new in 4.1:

*) fixed problem - RB750 (clocked at 300MHz) Ethernet did not work;
*) fixed problem - routes on some interfaces (like VLAN) were not activated;
*) ppp, gps, sms, serial terminal - allow use of different channels
    on same port across multiple programs simultaneous
*) dhcp server - added support for dynamic address-list entries;
*) hotspot - added support for dynamic address-list entries;
*) hotspot - fixed redirect after login in case if client gets new IP address
   (problem introduced in 3.28);

What's new in 4.0:

*) IT87XX hardware monitoring sensor support;
*) kvm allows to choose emulated nic model;
*) hotspot - fixed redirect after login in case if client gets new IP address
   (problem introduced in 3.28);
*) hotspot - fixed redirect after login in case if client gets new IP address;
*) console - commands like 'monitor', 'torch' and others that periodically
    refresh information sometimes failed to work when started from
    the scheduler;
*) console - scheduled scripts no longer require 'test' policy to run;
*) console - fix issues with scripts that contain lines with trailing spaces;
*) console - add back compatibility with old scripts that use space instead
    of '=' to separate argument name and value;
*) console - following fixes:
    - accept item numbers when prompted by command to specify item;
    - argument names without '=' were matched even when expecting unnamed
        value; this broke code such as:
           :foreach i in=1,2,3 do {}
       here 'i' was matched as argument name "in";
    - 'tab' key did not automatically append '=' after complete argument
        names;    

What's new in 4.0rc1:

*) console - removed support for Lua (will be reintroduced later);
*) incorporated all the bug fixes since v3.30;
*) port remote-access - added 'log-file' property. If value is a non-empty
    string, then all data that is read from the port is appended to a file
    with that name, regardless of the active remote connection;
*) console - removed '/user' from the output of top level '/export' command,
    still can be exported by '/user export';

What's new in 4.0beta4:

*) routing - changed BGP network and default-originate behavior;
*) web proxy - allow to edit error page;
*) console - terminal window size change now does not trigger full terminal
   reset;
*) mesh protocol - improved loop prevention (becomes incompatible with earlier versions);

*) incorporated all the bug fixes since v3.27;

What's new in 4.0beta3:

*) added support for 802.11n atheros based wireless cards;
*) added ability to run other OSs in MetaROUTERs;
*) console: Lua scripting language. http://wiki.mikrotik.com/wiki/Lua
*) console: added nstreme-dual OIDs;
*) incorporated all the bug fixes since v3.23;

What's new in 4.0beta2:

*) console: added 'without-paging' argument to 'monitor' commands;
*) console: now 'without-paging' and 'interval' arguments in of 'print'
    commands work together. Printing can be stopped by pressing 'q' or
    ctrl-c, any other key triggers printing;
*) incorporated all the bug fixes since v3.22;
*) fixed TFTP server logging;
*) fixed problem - "/system upgrade" did not show proper package
   architecture and was unable to fetch new packages;

What's new in 4.0beta1:

*) added support for MetaROUTERs;
*) all test packages are regular ones;
*) console - can mix named and unnamed arguments, can use names for unnamed
     argument values. For example all of the following commands are
     accepted now:
       /ping 10.11.12.13 count=4
       /ping address=10.11.12.13 count=4
       /ping count=4 10.11.12.13