/etc/cron.daily scripts may not have dots in their name

I just had the problem I'd placed a script into /etc/cron.daily on my Debian Lenny system but it wasn't getting run (or at least it didn't seem so). Two things I learned:

1. Execute the following to see which scripts would get run:

   run-parts --test /etc/cron.daily
   

2. In my case, the reason the script was never executed was that I called it xyz.sh as it was a shell script; the dot in the filename was the problem. I removed the dot and now it runs.