lintian is not approving what dh_compress does?

[Shaul Karl <shaulk@israsrv.net.il>]

I am trying to package TkMan for woody and have encountered a problem with 
lintain:

[01:21:04 tkman-2.1b3]$ lintian -i ../tkman_2.1b3-1_i386.changes 
E: tkman: manpage-not-compressed-with-gzip usr/share/man/man1/tkman.1.gz
N:
N:   Manual pages should be compressed with gzip -9.
N:   
N:   Please check out Policy Manual, section 6.1 for details.
N:
E: tkman: manpage-not-compressed-with-gzip usr/share/man/man1/retkman.1.gz
E: tkman: changelog-not-compressed-with-max-compression 
N:
N:   Any changelog files must be compressed using `gzip -9'.
N:   
N:   Refer to Policy Manual, section 6.8 for details.
N:
E: tkman: changelog-not-compressed-with-max-compression 
[01:21:48 tkman-2.1b3]$

However compression matters are handled by debian/rules with dh_compress.
Is this a bug with lintain and/or dh_compress?

[01:21:48 tkman-2.1b3]$ ls debian/tmp/usr/share/man/man1/
retkman.1.gz  tkman.1.gz
[01:35:32 tkman-2.1b3]$ ls debian/tmp/usr/share/doc/tkman/changelog.*
debian/tmp/usr/share/doc/tkman/changelog.Debian.gz
debian/tmp/usr/share/doc/tkman/changelog.gz
[01:36:20 tkman-2.1b3]$ 

BTW: How does lintian knows whether or not max-compression (-9) was used? Does 
it tries to compress the files by itself and then compares the result to what 
the package includes?

And a somewhat not related question: What about compressing man pages with 
bzip2?
-- 
Shaul Karl		 		   shaulk@israsrv.net.il
	An elephant is a mouse with an operating system.