Bug#159746: What support for 'Enhances:' is missing?

[Thomas Hood <jdthood@yahoo.co.uk>]

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jdthood@thanatos:$ sudo dpkg --install
thinkpad-modules-2.4.20-pre8-ac1_3.7-1_i386.deb
(Reading database ... 106385 files and directories currently installed.)
Preparing to replace thinkpad-modules-2.4.20-pre8-ac1 3.7-1+10.00.Custom
(using .../thinkpad-modules-2.4.20-pre8-ac1_3.7-1+10.00.Custom_i386.deb)
...
Unpacking replacement thinkpad-modules-2.4.20-pre8-ac1 ...
Setting up thinkpad-modules-2.4.20-pre8-ac1 (3.7-1+10.00.Custom) ...

jdthood@thanatos:/var/lib/dpkg$ dpkg -s thinkpad-modules-2.4.20-pre8-ac1
Package: thinkpad-modules-2.4.20-pre8-ac1
Status: install ok installed
Priority: extra
Section: utils
Installed-Size: 100
Maintainer: Thomas Hood <jdthood@mail.com>
Version: 3.7-1+10.00.Custom
Replaces: tpctl-modules-2.4.20-pre8-ac1
Provides: thinkpad-modules
Depends: thinkpad-base, modutils
Suggests: devfsd
Conflicts: tpctl-modules-2.4.20-pre8-ac1
Enhances: tpctl (>= 3.0)
Description: Device driver modules for configuring ThinkPads

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I don't receive any error messages, at least.
What support for 'Enhances:' is missing?

--
Thomas Hood