diff --git a/lib/aws/s3/acl.rb b/lib/aws/s3/acl.rb
index 334e6e9..b780aaf 100644
--- a/lib/aws/s3/acl.rb
+++ b/lib/aws/s3/acl.rb
@@ -528,7 +528,7 @@ module AWS
         #   bucket.acl(bucket.acl)
         def acl(reload = false)
           policy = reload.is_a?(ACL::Policy) ? reload : nil
-          memoize(reload) do
+          expirable_memoize(reload) do
             self.class.acl(name, policy) if policy
             self.class.acl(name)
           end
@@ -579,7 +579,7 @@ module AWS
         #   object.acl(object.acl)
         def acl(reload = false)
           policy = reload.is_a?(ACL::Policy) ? reload : nil
-          memoize(reload) do
+          expirable_memoize(reload) do
             self.class.acl(key, bucket.name, policy) if policy
             self.class.acl(key, bucket.name)
           end
diff --git a/lib/aws/s3/extensions.rb b/lib/aws/s3/extensions.rb
index 6a9bc75..312d90e 100644
--- a/lib/aws/s3/extensions.rb
+++ b/lib/aws/s3/extensions.rb
@@ -133,7 +133,7 @@ module Kernel
     caller[1][/`([^']+)'/, 1]
   end if RUBY_VERSION > '1.8.7'
   
-  def memoize(reload = false, storage = nil)
+  def expirable_memoize(reload = false, storage = nil)
     current_method = RUBY_VERSION >= '1.8.7' ? __called_from__ : __method__(1)
     storage = "@#{storage || current_method}"
     if reload 
@@ -174,7 +174,7 @@ class Module
     alias_method original_method, method_name
     module_eval(<<-EVAL, __FILE__, __LINE__)
       def #{method_name}(reload = false, *args, &block)
-        memoize(reload) do
+        expirable_memoize(reload) do
           send(:#{original_method}, *args, &block)
         end
       end
diff --git a/lib/aws/s3/object.rb b/lib/aws/s3/object.rb
index 77a60df..bcdf9e1 100644
--- a/lib/aws/s3/object.rb
+++ b/lib/aws/s3/object.rb
@@ -485,7 +485,7 @@ module AWS
           reload  = options
           options = {}
         end
-        memoize(reload) do
+        expirable_memoize(reload) do
           self.class.stream(key, bucket.name, options, &block)
         end
       end
@@ -561,7 +561,7 @@ module AWS
       
       def etag(reload = false)
         return nil unless stored?
-        memoize(reload) do
+        expirable_memoize(reload) do
           reload ? about(reload)['etag'][1...-1] : attributes['e_tag'][1...-1]
         end
       end
diff --git a/lib/aws/s3/version.rb b/lib/aws/s3/version.rb
index e112659..3f8f703 100644
--- a/lib/aws/s3/version.rb
+++ b/lib/aws/s3/version.rb
@@ -4,7 +4,7 @@ module AWS
       MAJOR    = '0'
       MINOR    = '6'
       TINY     = '0' 
-      BETA     = nil # Time.now.to_i.to_s
+      BETA     = Time.now.to_i.to_s
     end
     
     Version = [VERSION::MAJOR, VERSION::MINOR, VERSION::TINY, VERSION::BETA].compact * '.'
diff --git a/test/extensions_test.rb b/test/extensions_test.rb
index 846d76e..8bbe100 100644
--- a/test/extensions_test.rb
+++ b/test/extensions_test.rb
@@ -144,13 +144,13 @@ end if RUBY_VERSION < '1.8.7'
 class ModuleExtensionsTest < Test::Unit::TestCase
   class Foo
     def foo(reload = false)
-      memoize(reload) do
+      expirable_memoize(reload) do
         Time.now
       end
     end
     
     def bar(reload = false)
-      memoize(reload, :baz) do
+      expirable_memoize(reload, :baz) do
         Time.now
       end
     end