Should the PVP be changed with regards to instances?

[Henning Thielemann]

On Tue, 20 Dec 2011, Ganesh Sittampalam wrote:

> Agreed, but the situation here is that the no pre-approved solution
> already exists and the author of something that wants those instances
> has to decide what to do right away.

The package that provides the orphan instance should define the orphan 
instance depending on the version of imported packages for the affected 
class and type. The packages that import the orphan instance package 
should not need to do such distinctions.