On Tue, Mar 16, 2010 at 05:11:01PM +0300, Alexey Tourbin wrote:
> gb-task-check-lastchange: new check for inheritance
> http://git.altlinux.org/people/at/packages/girar-builder.git?a=commitdiff;h=132737dc
> 
> +#
> +# When updating a package V1->V2, last changelog entry in V1
> +# must be present among changelog entries in V2.  This is how
> +# we can retain NMU and promote QA activity.
> +#

More examples follow along with a simple script to automate comparsion.

[at@altair at]$ ./changelogdiff /ALT/archive/Sisyphus/2009/08/01 /ALT/archive/Sisyphus/2009/09/01 >diff