Adam Kennedy explained to me why people like to type "install" after the cpan command. Previously, this found the junoscript, which as an install.pm. Linux people type things such as "apt-get install", so the muscle memory to type "install" is there.
cpan-script-1.54 is now in PAUSE. If you want to do the extra typing, now you'll won't see the annoying warning.
Adam says I'll get 50 thank yous for this small change, but we'll see.