debhelper upgrade makes lintian complain?

[frank@kuesterei.ch (Frank Küster)]

Hi all,

I am about to make a new package of netenv. First, I just incorporated
the new upstream version, and the package I build passed the lintian
test. However, the postinst script in netenv-0.82 asked
questions. Therefore I debconf'ized the package. I did some more minor
changes, but I am not aware of one affecting doc installation. What
probably happened in the meantime was that I installed Adrian Bunk's
backport of debhelper-4.1.37 on my woody system (which, of course, also
upgraded /usr/bin/dh_installdocs.

Now lintian complains: 

W: netenv: prerm-does-not-remove-usr-doc-link
W: netenv: postinst-does-not-set-usr-doc-link

Formerly, the respective links where set by parts that dh_installdocs
put into postinst and prerm.

Did I do something wrong, or is this due to the debhelper upgrade? Is
this link now obsolete? And if the latter is true, do I need an upgraded
lintian as well?

TIA, Frank
-- 
Frank Küster, Biozentrum der Univ. Basel
Abt. Biophysikalische Chemie