bash/rvm in wayneeseguin-rvm-0.0.7 vs bash/rvm in wayneeseguin-rvm-0.0.8

@@ -292,15 +292,17 @@
 
 }
 
 function rvm-use {
 
+  implementation="${1-$implementation}"
   case "$implementation" in
 
     default)
       rm -f ~/.rvm/current
       unset MY_RUBY_HOME
       unset GEM_HOME
+      unset RUBY_VERSION
     ;;
     #leopard) MY_RUBY_HOME="/System/Library/Frameworks/Ruby.framework/Versions/Current/usr"; GEM_HOME="$HOME/.gem/ruby/1.8" ;;
 
     jruby)
       version="${version-1.3.1}"