I just tried it on P6 and P7, using James and Simon respectively and the stock poses, and it worked. Maybe it only fails when you need it to work... :(

Quote - There's also the option of "Memorizing" it with Edit->memorize->figure

That doesn't do what's wanted here though TG. Memorize sets the default pose of the figure, i.e. the one you get when you select Restore from the same menu. I suppose it could be used as a pose memory, but at the expense of breaking the figure's default pose which could be important if you use IK.

Quote - I use the pose library as well, I can never remember what I put where with the pose dots.  O also tend to cut and paste keyframes instead of applying a pose , its just a work method I got used to.

That sounds useful, but I have to admit I don't know how to copy a complete keyframe, and messing about in the keyframe editor didn't get me anywhere. I suppose I could always read the manual, but when did that ever work? :)