"The package gperf should be rebuilt with new debhelper to get trigger support"

"apt-get install gperf" says this on oneric.

$ sudo apt-get install gperf
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libnet-domain-tld-perl libemail-valid-perl
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
  gperf
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 139 kB of archives.
After this operation, 340 kB of additional disk space will be used.
Get:1 http://www.lug.bu.edu/mirror/ubuntu/ oneiric/main gperf amd64 3.0.3-1build3 [139 kB]
Fetched 139 kB in 0s (620 kB/s)
Selecting previously deselected package gperf.
(Reading database ... 232067 files and directories currently installed.)
Unpacking gperf (from .../gperf_3.0.3-1build3_amd64.deb) ...
Processing triggers for man-db ...
Processing triggers for install-info ...
Processing triggers for doc-base ...
Processing 1 added doc-base file...
Registering documents with scrollkeeper...
Setting up gperf (3.0.3-1build3) ...
Ignoring install-info called from maintainer script
The package gperf should be rebuilt with new debhelper to get trigger support

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gperf 3.0.3-1build3
ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
Uname: Linux 3.0.0-16-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Wed Mar 14 13:24:40 2012
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
SourcePackage: gperf
UpgradeStatus: Upgraded to oneiric on 2012-03-10 (4 days ago)