W: native-package-with-dash-versionと言われる。

$ lintian -i ../swatjhtml_0.1-2_i386.changes
W: swatjhtml source: native-package-with-dash-version
N:
N:   Native packaging should only be used if a piece of software was
N:   written specifically to be turned into a Debian package. In this case,
N:   the version number should not contain a debian revision part.
N:
N:   Native source packages are sometimes created by accident. In most
N:   cases the reason is the location of the original source tarball.
N:   dpkg-source searches for this in
N:   ../package_upstream-version.orig.tar.gz.
N:

orig.tar.gzを消したのが原因だった模様。