I just came accross another instance where this becomes a serious workflow problem. We had a drive failure so had to move the project and all the media to another drive and back again. When re-connecting the clips, they all came in as subclips. Deleting the subclips and just importing the original clips, broke the timecode references to the sequence. Essentally the editor had to start all over. He hadn’t gotten very far into the project, but he would have waisted a lot of time if it had happened further along.