HMKM joined the community
Our office is using New G5 Mac's with both OS X Tiger 10.4.5 and Panther 10.3.9 with the latest version of V12.0.1 (53930). We have experienced problems with "unrecognizable file' and unable to re open this drawing as contents of drawing information removed to create an empty file. We are saving to back up and retrieving corrupted files but in the past have lost substantial amount of work. This problems seems to occur regardless of the method we use to open the file.