I was fooling around with m4 macros and latex and noticed a strange string added when I pipe output from debbie to a file. The string is: ^[]0;osso_xterm^g. Where is it coming from and can I prevent it?

Just try: "debbie ls > files" and use vim to view the output. It does not show up in vi or when you do 'cat files' but latex is complaining about it. Can I get rid of it somehow?