As I said in another post we upgraded to 2013 last week. I have noticed something strange/annoying when I open up models done in older versions. Basically we design bottles and I would have the finish (part on top of bottle with threads) set up as parts in a library, and I would drag into a new model as a derived part and then model up the rest of bottle underneath. If I open a model done in for example 2012 it opens a copy of the derived part, and even if I happen to have inserted a part for reference it does the same. I modeled a bottle yesterday starting from scratch in 2013 and this does not occur. I thought by saving the older model this might stop it but it doesn't. Any ideas on how to stop this happening?

Regards,

James