Copying from DWG

[Hobbesnb]

Has anyone else noticed that AC15 won't let you copy directly from a DWG opened up in a separate instance of ArchiCAD?

Often times, when I'm pulling details from manufacturers, I'll open their DWGs in one instance of ArchiCAD, modify pens/fills/etc so I can avoid corrupting my working file, and then copy those elements I want into my primary instance of ArchiCAD. I used to be able to do this without a hitch, but now I have to save the DWG as PLN before I can copy elements between files.

Is there a setting somewhere to change this? Most of the time, i'm not even interested in preserving copies of the source DWGs, so having to save a duplicate in PLN format is a nuissance.