There's supposed to be a "|" in front of the command.

These files don't seem to come from the less source distribution, but are
in the less-340-2 rpm on rawhide.

With these changes, "less file.rpm", etc., work for me.

--- less.sh~    Sun Jan  9 14:28:43 2000
+++ less.sh     Sat Jan 22 13:38:07 2000
@@ -1,4 +1,4 @@
 # KDE initialization script (sh)
 if [ -x /usr/bin/lesspipe.sh ] ; then
-  export  LESSOPEN="/usr/bin/lesspipe.sh %s"
+  export  LESSOPEN="|/usr/bin/lesspipe.sh %s"
 fi

--- less.csh~   Sun Jan  9 14:28:43 2000
+++ less.csh    Sat Jan 22 13:38:15 2000
@@ -1,2 +1,2 @@
 # KDE initialization script (csh)
-test -x /usr/bin/lesspipe.sh || setenv LESSOPEN "/usr/bin/lesspipe.sh %s"
+test -x /usr/bin/lesspipe.sh || setenv LESSOPEN "|/usr/bin/lesspipe.sh %s"