Use quotes for filename parameter.

editvorbis.sh

@@ -62,7 +62,7 @@ if [ $? == 1 ]; then
 fi
 
 # check if the file exists
-if [ ! -f $1 ]; then
+if [ ! -f "$1" ]; then
 	echo "Regular file $1 does not exist."
 	exit 1
 fi

install.sh

@@ -1,5 +1,5 @@
-#!/bin/sh
-if [ -z ${$PREFIX+x} ];
+#!/bin/bash
+if [ -z ${PREFIX+x} ];
 then
 	PREFIX=/usr
 fi