Aligorith's Blender 2.5 Development FAQ

Blender developer Aligorith posted, on his new blog, an informative FAQ about various 2.5 development issues:

Thanks Aligorith.

Very nice!
Thank very much to Aligorith for these answers!

I got also one question. How to use copy Visual Location (/Rotation/etc) in Blender 2.5? This was the way how to set up seamless (“no popping” :-)) FK <-> IK switching.
Or is there another way how to make this in 2.5?
Thank you for your answer in advance.