diff --git a/lz/lz b/lz/lz
index 754c419..c825c05 100755
--- a/lz/lz
+++ b/lz/lz
@@ -19,7 +19,7 @@
 
 ## Verify program name ##
 
-PROGRAM=`basename $0`
+PROGRAM="`basename $0`"
 
 if [ "$PROGRAM" = "lz" ] ; then
 	ACTION="t"
@@ -42,34 +42,40 @@ fi
 ## Process files ##
 
 for F in "$@" ; do
+	if [ "$ACTION" = "t" ] ; then
+		echo "*** Listing « $F » ***" >&2
+	else
+		echo "Extracting « $F »…" >&2
+	fi
+
 	# Simple Tar archive
-	if [ `basename "$F" .tar` != "$F" ] ; then
+	if [ "`basename "$F" .tar`" != "$F" ] ; then
 		FORMAT=""
 
 	# GZipped Tar
-	elif [ `basename "$F" .tar.gz` != "$F" \
-				-o `basename "$F" .tgz` != "$F" ] ; then
+	elif [ "`basename "$F" .tar.gz`" != "$F" \
+				-o "`basename "$F" .tgz`" != "$F" ] ; then
 		FORMAT="--gzip"
 
 	# BZipped Tar
-	elif [ `basename "$F" .tar.bz2` != "$F" \
-				-o `basename "$F" .tbz` != "$F" \
-				-o `basename "$F" .tb2` != "$F" ] ; then
+	elif [ "`basename "$F" .tar.bz2`" != "$F" \
+				-o "`basename "$F" .tbz`" != "$F" \
+				-o "`basename "$F" .tb2`" != "$F" ] ; then
 		FORMAT="--bzip"
 
 	# XZipped Tar
-	elif [ `basename "$F" .tar.xz` != "$F" \
-				-o `basename "$F" .txz` != "$F" ] ; then
+	elif [ "`basename "$F" .tar.xz`" != "$F" \
+				-o "`basename "$F" .txz`" != "$F" ] ; then
 		FORMAT="--xz"
 
 	# Compressed Tar
-	elif [ `basename "$F" .tar.Z` != "$F" \
-				-o `basename "$F" .taz` != "$F" ] ; then
+	elif [ "`basename "$F" .tar.Z`" != "$F" \
+				-o "`basename "$F" .taz`" != "$F" ] ; then
 		FORMAT="--compress"
 
 	# LZMA compressed Tar
-	elif [ `basename "$F" .tar.lzma` != "$F" \
-				-o `basename "$F" .tlz` != "$F" ] ; then
+	elif [ "`basename "$F" .tar.lzma`" != "$F" \
+				-o "`basename "$F" .tlz`" != "$F" ] ; then
 		FORMAT="--lzma"
 
 	# Unknown extension