usb-creator-* fails with message cannot install bootloader

it looks for files into directory /usr/lib/syslinux/ but (in ubuntu Wily) the correct path is
/usr/lib/SYSLINUX/

A workaround is a symbolic link (cd /usr/lib/; sudo ln -s SYSLINUX syslinux)
and it works

--- Logging error ---
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/usbcreator/install.py", line 257, in install_bootloader
    timeout=MAX_DBUS_TIMEOUT)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.usbcreator.misc.USBCreatorProcessException: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/usb-creator/usb-creator-helper", line 231, in InstallBootloader
    'bs=446', 'count=1', 'conv=sync'])
  File "/usr/lib/python3/dist-packages/usbcreator/misc.py", line 174, in popen
    raise USBCreatorProcessException(err)
usbcreator.misc.USBCreatorProcessException: dd: failed to open '/usr/lib/syslinux/mbr.bin': No such file or directory