man1/xvkbd.1.gz start with useless blank lines

[svardew]

[ubuntu release]
Description: Ubuntu 14.04.5 LTS
Release: 14.04

[package version]
xvkbd:
  Installed: 3.3-1
  Candidate: 3.3-1
  Version table:
 *** 3.3-1 0
        500 http://jp.archive.ubuntu.com/ubuntu/ trusty/universe i386 Packages
        100 /var/lib/dpkg/status

[expected to happen]
open manpage in terminal ($ man 1 xvkbd), first line start with 'xvkbd(1)'

[happened instead]
open manpage in terminal ($ man 1 xvkbd), none is shown.
there is 36 blank lines.
after a few scroll down, start manual.

difference between xvkdb.1 (in xvkbd_3.3-1_i386.deb) and xvkbd.man (in xvkbd_3.3.orig.tar.gz) is head 36 empty lines.

[Paul Gevers (paul-climbing)]

I see the empty lines, but I don't reproduce the behavior. In my case calling "man xvkbd" just starts with text (as makes sense, as man formats the text.