What’s new in 5.15 (2012-Apr-20 13:11):
*) ssh - added option “/ip ssh always-allow-password-login” which will allow
password based login for users using public key;
*) snmp - moved disk oids shown in console from “/system resoure” to “/store disk”;
*) certificate manager - added PKCS#8 support for key import;
*) lte - support for modems which utilize sierra_net driver with product ID 0x68a3,
serial interface is no longer accesable for those modems;
*) quickset - added AP mode;
*) smb - fixed authorization problems, shares should now be browsable;
*) dhcp client - revert NTP settings on dhcp client disable;
*) dhcp server - use DNS server from DHCP client (broken in v5.13);
*) sstp - made it working on Pentium 4 again;
*) webfig - fixed uptime column in hotspot active users list (and other places as well) ;
*) webfig - hide design skin button if user does not have
sensitive & policy permissions;
*) webfig - do not allow to upload/download files
without write/read & ftp permisions;
*) webfig - fixed blank page when logout, undo, redo, hide-menu or safe-mode were hidden in skin,
*) winbox - show connection tracking max entries properly;
*) winbox - make interface name sorting more stable;
*) winbox - do not reset user password when changing it’s properties;
*) rb1200 ether6,ether7,ether8 did not support big packets when linked at 10/100Mbps;
Wireless is not mentioned. Any Nv2 inprovements though?
Any changes for 750UP ?
Tell me more…
are the openvpn bugs introduced in 5.14 fixed? still using 5.13
I can see changes in wireless. I’m using Mikrotik as home AP, after install 5.15 I getting better throughput with Intel wireless cards. Now I can obtain about 80Mb/s HDX tcp bandwidth in b/g/n mode (20Mhz). Also I see changes in energy power saving. Finally, my computer is able to connect with mobile devices which are use energy power saving and are connected to the Mikrotik AP. 
Unfortunately, energy power saving is not so good in comparison to the access points of other manufacturers. My mobile phone eats battery faster when connects with Mikrotik..
Great.. There were two bugs in 5.12-5.14 that affected me greatly and I didn’t know about them.. Well you live and learn as they say..
Winbox closes when I click Quickset - RB411U
*) webfig - fixed uptime column in hotspot active users list (and other places as well) ;
*) usermanager - I saw Calling Station ID in user session
My request :-bd (in YM) thanks alot
Wonderfull. 
There may be broadcast frames hitting your client devices. Therefore the higher battery consumption for them.
I am not receiving email alert when new version is out.
Any one else?
There’s an RSS feed - use that ?
I confirmed it!
Somehow 5.15 breaks one of my PPPoE client connections (authentication failure).
Reverting back to 5.14 brings everything back to normal.
And how do I use this version CPU stability? Not sure whether the contractor has, moreover, a new version?
Also in v5.15 is support for WiFi multicast to handheld devices.
I’m not sure why this was omitted from the list of fixes.
Previously, v5.x and v4.x did NOT support WiFi multicast to handheld devices.
See http://forum.mikrotik.com/t/wifi-multicast-not-supported-in-ros-v4-and-v5-for-smartphone/54138/1 for detailed information.
Does no one know the technical aspects of this feature???
kkolev, wireless improvements were added to 5.15.
NAB, jandafields, you can attach USB device to RouterBOARD USB port and operate it by Windows computer.
However, this option is added to v6.x only, changelog entry was added by mistake, this option applies for v6.x
jcem, do you have the latest Winbox version?
Caci99, honzam, e-mail has been sent only today, thank you for the concern.
estdata, what is the problem with the CPU stability?
In the future, can you make Winbox-lite version or Webfig-lite version for GSM (no operating system Android or Simbian)
why isn’t current webfig working for you over GSM? works fine for me.
if you want lesser number of menus, use Webfig SKIN editor to make a lite version yourself