diff --git a/nvm.sh b/nvm.sh
index 88bf290..abf16f3 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -138,8 +138,8 @@ nvm_ls() {
       | sort -t. -u -k 1.2,1n -k 2,2n -k 3,3n | grep -v '^ *\.'`
   fi
   if [ -z "$VERSIONS" ]; then
-      echo "N/A"
-      return
+    echo "N/A"
+    return
   fi
   echo "$VERSIONS"
   return
@@ -181,7 +181,7 @@ nvm_checksum() {
     echo 'Checksums empty' #missing in raspberry pi binary
     return
   else
-    echo 'Checksums do not match.'
+    echo 'Checksums do not match.' >&2
     return 1
   fi
 }
@@ -308,7 +308,7 @@ nvm() {
         fi
         provided_version="$NVM_RC_VERSION"
       fi
-      [ -d "$NVM_DIR/$provided_version" ] && echo "$provided_version is already installed." && return
+      [ -d "$NVM_DIR/$provided_version" ] && echo "$provided_version is already installed." >&2 && return
 
       VERSION=`nvm_remote_version $provided_version`
       ADDITIONAL_PARAMETERS=''
@@ -322,13 +322,13 @@ nvm() {
       done
 
       if [ -d "$NVM_DIR/$VERSION" ]; then
-        echo "$VERSION is already installed."
+        echo "$VERSION is already installed." >&2
         nvm use "$VERSION"
         return $?
       fi
 
       if [ "$VERSION" = "N/A" ]; then
-        echo "Version '$provided_version' not found - try \`nvm ls-remote\` to browse available versions."
+        echo "Version '$provided_version' not found - try \`nvm ls-remote\` to browse available versions." >&2
         return 3
       fi
 
@@ -395,10 +395,10 @@ nvm() {
         if ! nvm_has "npm" ; then
           echo "Installing npm..."
           if [ "`expr "$VERSION" : '\(^v0\.1\.\)'`" != '' ]; then
-            echo "npm requires node v0.2.3 or higher"
+            echo "npm requires node v0.2.3 or higher" >&2
           elif [ "`expr "$VERSION" : '\(^v0\.2\.\)'`" != '' ]; then
             if [ "`expr "$VERSION" : '\(^v0\.2\.[0-2]$\)'`" != '' ]; then
-              echo "npm requires node v0.2.3 or higher"
+              echo "npm requires node v0.2.3 or higher" >&2
             else
               curl https://npmjs.org/install.sh | clean=yes npm_install=0.2.19 sh
             fi
@@ -407,7 +407,7 @@ nvm() {
           fi
         fi
       else
-        echo "nvm: install $VERSION failed!"
+        echo "nvm: install $VERSION failed!" >&2
         return 1
       fi
     ;;
@@ -415,12 +415,12 @@ nvm() {
       [ $# -ne 2 ] && nvm help && return
       PATTERN=`nvm_format_version $2`
       if [ "$PATTERN" = `nvm_version` ]; then
-        echo "nvm: Cannot uninstall currently-active node version, $PATTERN."
+        echo "nvm: Cannot uninstall currently-active node version, $PATTERN." >&2
         return 1
       fi
       VERSION=`nvm_version $PATTERN`
       if [ ! -d $NVM_DIR/$VERSION ]; then
-        echo "$VERSION version is not installed..."
+        echo "$VERSION version is not installed..." >&2
         return;
       fi
 
@@ -447,19 +447,19 @@ nvm() {
         hash -r
         echo "$NVM_DIR/*/bin removed from \$PATH"
       else
-        echo "Could not find $NVM_DIR/*/bin in \$PATH"
+        echo "Could not find $NVM_DIR/*/bin in \$PATH" >&2
       fi
       if [ `expr "$MANPATH" : ".*$NVM_DIR/.*/share/man.*"` != 0 ] ; then
         export MANPATH=`nvm_strip_path "$MANPATH" "/share/man"`
         echo "$NVM_DIR/*/share/man removed from \$MANPATH"
       else
-        echo "Could not find $NVM_DIR/*/share/man in \$MANPATH"
+        echo "Could not find $NVM_DIR/*/share/man in \$MANPATH" >&2
       fi
       if [ `expr "$NODE_PATH" : ".*$NVM_DIR/.*/lib/node_modules.*"` != 0 ] ; then
         export NODE_PATH=`nvm_strip_path "$NODE_PATH" "/lib/node_modules"`
         echo "$NVM_DIR/*/lib/node_modules removed from \$NODE_PATH"
       else
-        echo "Could not find $NVM_DIR/*/lib/node_modules in \$NODE_PATH"
+        echo "Could not find $NVM_DIR/*/lib/node_modules in \$NODE_PATH" >&2
       fi
     ;;
     "use" )
@@ -470,7 +470,7 @@ nvm() {
       if [ $# -eq 1 ]; then
         nvm_rc_version
         if [ -n "$NVM_RC_VERSION" ]; then
-            VERSION=`nvm_version $NVM_RC_VERSION`
+          VERSION=`nvm_version $NVM_RC_VERSION`
         fi
       else
         VERSION=`nvm_version $2`
@@ -483,7 +483,7 @@ nvm() {
         VERSION=`nvm_version $2`
       fi
       if [ ! -d "$NVM_DIR/$VERSION" ]; then
-        echo "$VERSION version is not installed yet"
+        echo "$VERSION version is not installed yet" >&2
         return 1
       fi
       # Strip other version from PATH
@@ -542,7 +542,7 @@ nvm() {
       fi
 
       if [ ! -d "$NVM_DIR/$VERSION" ]; then
-        echo "$VERSION version is not installed yet"
+        echo "$VERSION version is not installed yet" >&2
         return;
       fi
       RUN_NODE_PATH=`nvm_strip_path "$NODE_PATH" "/lib/node_modules"`
@@ -558,8 +558,8 @@ nvm() {
       return
     ;;
     "ls-remote" | "list-remote" )
-        nvm_print_versions "`nvm_ls_remote $2`"
-        return
+      nvm_print_versions "`nvm_ls_remote $2`"
+      return
     ;;
     "current" )
       nvm_version current
@@ -573,18 +573,18 @@ nvm() {
             DEST=`cat $ALIAS`
             VERSION=`nvm_version $DEST`
             if [ "$DEST" = "$VERSION" ]; then
-                echo "$(basename $ALIAS) -> $DEST"
+              echo "$(basename $ALIAS) -> $DEST"
             else
-                echo "$(basename $ALIAS) -> $DEST (-> $VERSION)"
+              echo "$(basename $ALIAS) -> $DEST (-> $VERSION)"
             fi
           fi
         done
         return
       fi
       if [ -z "$3" ]; then
-          rm -f $NVM_DIR/alias/$2
-          echo "$2 -> *poof*"
-          return
+        rm -f $NVM_DIR/alias/$2
+        echo "$2 -> *poof*"
+        return
       fi
       mkdir -p $NVM_DIR/alias
       VERSION=`nvm_version $3`
@@ -593,7 +593,7 @@ nvm() {
       fi
       echo $3 > "$NVM_DIR/alias/$2"
       if [ ! "$3" = "$VERSION" ]; then
-          echo "$2 -> $3 (-> $VERSION)"
+        echo "$2 -> $3 (-> $VERSION)"
       else
         echo "$2 -> $3"
       fi
@@ -601,34 +601,34 @@ nvm() {
     "unalias" )
       mkdir -p $NVM_DIR/alias
       [ $# -ne 2 ] && nvm help && return 127
-      [ ! -f "$NVM_DIR/alias/$2" ] && echo "Alias $2 doesn't exist!" && return
+      [ ! -f "$NVM_DIR/alias/$2" ] && echo "Alias $2 doesn't exist!" >&2 && return
       rm -f $NVM_DIR/alias/$2
       echo "Deleted alias $2"
     ;;
     "copy-packages" )
-        if [ $# -ne 2 ]; then
-          nvm help
-          return 127
-        fi
-        VERSION=`nvm_version $2`
-        local ROOT=`(nvm use $VERSION && npm -g root)`
-        local ROOTDEPTH=$((`echo $ROOT | sed 's/[^\/]//g'|wc -m` -1))
+      if [ $# -ne 2 ]; then
+        nvm help
+        return 127
+      fi
+      VERSION=`nvm_version $2`
+      local ROOT=`(nvm use $VERSION && npm -g root)`
+      local ROOTDEPTH=$((`echo $ROOT | sed 's/[^\/]//g'|wc -m` -1))
 
-        # declare local INSTALLS first, otherwise it doesn't work in zsh
-        local INSTALLS
-        INSTALLS=`nvm use $VERSION > /dev/null && npm -g -p ll | \grep "$ROOT\/[^/]\+$" | cut -d '/' -f $(($ROOTDEPTH + 2)) | cut -d ":" -f 2 | \grep -v npm | tr "\n" " "`
+      # declare local INSTALLS first, otherwise it doesn't work in zsh
+      local INSTALLS
+      INSTALLS=`nvm use $VERSION > /dev/null && npm -g -p ll | \grep "$ROOT\/[^/]\+$" | cut -d '/' -f $(($ROOTDEPTH + 2)) | cut -d ":" -f 2 | \grep -v npm | tr "\n" " "`
 
-        npm install -g ${INSTALLS[@]}
+      npm install -g ${INSTALLS[@]}
     ;;
     "clear-cache" )
-        rm -f $NVM_DIR/v* 2>/dev/null
-        echo "Cache cleared."
+      rm -f $NVM_DIR/v* 2>/dev/null
+      echo "Cache cleared."
     ;;
     "version" )
-        nvm_version $2
+      nvm_version $2
     ;;
     "--version" )
-        echo "0.7.0"
+      echo "0.7.0"
     ;;
     "unload" )
       unset -f nvm nvm_print_versions nvm_checksum nvm_ls_remote nvm_ls nvm_remote_version nvm_version nvm_rc_version > /dev/null 2>&1
diff --git "a/test/fast/Running \"nvm install\" with an invalid version fails nicely" "b/test/fast/Running \"nvm install\" with an invalid version fails nicely"
index 2f556e9..d113890 100755
--- "a/test/fast/Running \"nvm install\" with an invalid version fails nicely"	
+++ "b/test/fast/Running \"nvm install\" with an invalid version fails nicely"	
@@ -3,5 +3,5 @@
 die () { echo $@ ; exit 1; }
 
 . ../../nvm.sh
-[ "$(nvm install invalid.invalid)" = "Version 'invalid.invalid' not found - try \`nvm ls-remote\` to browse available versions." ] || die "nvm installing an invalid version did not print a nice error message"
+[ "$(nvm install invalid.invalid 2>&1)" = "Version 'invalid.invalid' not found - try \`nvm ls-remote\` to browse available versions." ] || die "nvm installing an invalid version did not print a nice error message"
 
diff --git a/test/slow/nvm install/install already installed uses it b/test/slow/nvm install/install already installed uses it
index 7e42c07..ffcbb02 100755
--- a/test/slow/nvm install/install already installed uses it	
+++ b/test/slow/nvm install/install already installed uses it	
@@ -4,7 +4,7 @@ die () { echo $@ ; exit 1; }
 
 . ../../../nvm.sh
 
-[ "$(nvm install invalid.invalid)" = "Version 'invalid.invalid' not found - try \`nvm ls-remote\` to browse available versions." ] || die "nvm installing an invalid version did not print a nice error message"
+[ "$(nvm install invalid.invalid 2>&1)" = "Version 'invalid.invalid' not found - try \`nvm ls-remote\` to browse available versions." ] || die "nvm installing an invalid version did not print a nice error message"
 
 # Remove the stuff we're clobbering.
 [ -e ../../../v0.9.7 ] && rm -R ../../../v0.9.7