Ja foi lançada a correção com a 5.16 versão nova ja esta no site - Link abaixo

What's new in 5.16 (2012-May-09 17:23):

• webfig - fixed problem when new item addition to status page in design skin mode did not work;
• add pw-type option for BGP VPLS;
• fixed mac telnet - sometimes did not work if more than one mac level path to destination;
• user - fixed problem when adding new users from console it's password was not set;
• reset packet mark when encapsulating/decapsulating from eoip,ipip,gre,eoipv6,ipipv6,gre6 tunnels

Version 5.15(No-Stable) * 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;
• added support for usb forwarding over tcp;
• 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;

Mikrotik