Most of the changes have happened on a PackageKit backend which is not relevant to Debian, so you can safely ignore these changes.
Anyway, I'll post a list of all commits & changes which were relevant to Debian and comment on them here, so you don't have to review the stuff (and can instead just read my comments). I'll do thiswhen I'm back home.
Am 03.09.2012 12:18 schrieb "Julien Cristau" <email@example.com>:
> On Tue, Aug 21, 2012 at 18:16:24 +0200, Matthias Klumpp wrote:
> > Package: release.debian.org
> > Severity: normal
> > User: firstname.lastname@example.org
> > Usertags: unblock
> > Please unblock package packagekit
> > PackageKit 0.7.6 is a bugfix-only release, which fixes some bugs (some of them
> > can cause crashes) and one RC bug reported against Debian.
> > I recomment accepting this version, as the changes are small and the stability
> > of PackageKit is increased.
> > I added a report about all changes affecting Debian to the changelog.
> > If necessary, I can go through every single patch, but I don't think that's
> > necessary - most changes are simple.
> 48 files changed, 1451 insertions(+), 806 deletions(-)
> That's not something I'm going to have time to look at.