We have had trouble in the past with a customer's firewall not allowing ordinary zipfiles through, but having no qualms over password-protected zips. They zipped the logfile, then super-zipped it with a password, which our support guys helpfully stripped out before passing it on to us. Makes one boggle...

This comment is infected with an honour-system virus. Please delete some files at random, reboot three times and pass it on to another post.

Yes, that's precisely the running joke I was thinking of :-)