Just posted this in the Dassault DraftSight forum, but since their iQuestions search function sucks and no one will likely find it, I am posting it here as well. Hope nobody minds.
After my current version of DraftSight spontaneously expired and I had to upgrade to V1R3, the Activity Monitor...
It seems to be hit or miss. It will either let me copy/paste from one file to another, or it will occasionally give me an error. Still beats WBLOCKing everything.
OSX 10.8.2 | DS V1R2.1