To the developers, thank you so much for a freeware double pane file explorer for the Mac. I come from the PC world where there's easily dozens. Other than the commercial Pathfinder there's not too many choices. I use muCommander every few days and appreciate it! I did notice that it has sometimes problem deleting folders on a FTP server. I have to go login via Cyberduck to delete the folders. My only other suggestion is what others have mentioned, background file operation. Other than that it's a great product.