Yesterday I entered the usual command rsync -avz --delete rsync://...(the perl-current repository) . to resync the bleadperl source tree on my machine.
Unfortunately, I forgot to chdir first. The current directory was my $HOME. Consequently, I lost all my files.
Then, I had to recover.
But I lost my procmailrc (argh), my newsreader scorefile (double-argh), and my extensive collection of desktop backgrounds.
End of the story: I now have a cronjob that backups all this stuff on another disk.