Hello. I am running several systems that are a mix of stable, testing and sid, with apt preferences set up such that stable is the highest priority, testing lower than stable, sid lower that testing.
When something from e.g. sid is needed for some reason, I run apt-get -t unstable install xxx This often upgrades library packages also. But often when library package is upgraded, other packages related to the library (-dev, -doc, ...) stay at older version. This may or may not cause technical problems, but definitly is some sort of inconsistency that is really difficult to resolve always by hands. Maybe this shoul be resolved by adding appropriate dependences/conflicts to the packages? E.g. all packages related to the library package should conflict with any other version of the library package? Or there should be a way to make apt to upgrade/downgrade all packages built from the same source at once (whan any package from that source is being upgraded/downgraded)?
