What's new in 5.5 (2011-Jun-20 14:43):

*) console - resolved problem that appeared in version 5.4. it caused
    'sup-output' command to crash console on systems with many ethernet
    interfaces or very long interface names.
*) serial console - do not automatically send login prompt to attached
   usb modem if no other serial port exists;
*) winbox - fixed scrolling in terminal window;
*) webfig - encrypt whole session even in non https mode;
*) do not show contents of skin files to users without
   'sensitive' permission;