diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index e4c47c9bc3..b852a0354f 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1848,7 +1848,7 @@ module ActiveRecord #:nodoc:
         rescue SyntaxError => err
           self.class.read_methods.delete(attr_name)
           if logger
-            logger.warn "Exception occured during reader method compilation."
+            logger.warn "Exception occurred during reader method compilation."
             logger.warn "Maybe #{attr_name} is not a valid Ruby identifier?"
             logger.warn "#{err.message}"
           end
diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index af222e38e4..9eb3b5792b 100755
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -308,7 +308,7 @@ class Fixtures < YAML::Omap
             end
           end
         rescue Exception=>boom
-          raise Fixture::FormatError, "a YAML error occured parsing #{yaml_file_path}. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Please have a look at http://www.yaml.org/faq.html\nThe exact error was:\n  #{boom.class}: #{boom}"
+          raise Fixture::FormatError, "a YAML error occurred parsing #{yaml_file_path}. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Please have a look at http://www.yaml.org/faq.html\nThe exact error was:\n  #{boom.class}: #{boom}"
         end
       elsif File.file?(csv_file_path)
         # CSV fixtures
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb
index c1da53c878..17ca446650 100644
--- a/activesupport/lib/active_support/dependencies.rb
+++ b/activesupport/lib/active_support/dependencies.rb
@@ -163,11 +163,11 @@ class Exception #:nodoc:
 
   def describe_blame
     return nil if blamed_files.empty?
-    "This error occured while loading the following files:\n   #{blamed_files.join "\n   "}"
+    "This error occurred while loading the following files:\n   #{blamed_files.join "\n   "}"
   end
 
   def copy_blame!(exc)
     @blamed_files = exc.blamed_files.clone
     self
   end
-end
\ No newline at end of file
+end
diff --git a/activesupport/lib/active_support/whiny_nil.rb b/activesupport/lib/active_support/whiny_nil.rb
index 61cbe98e2b..cee510afbd 100644
--- a/activesupport/lib/active_support/whiny_nil.rb
+++ b/activesupport/lib/active_support/whiny_nil.rb
@@ -30,7 +30,7 @@ class NilClass
     def raise_nil_warning_for(klass = nil, selector = nil, with_caller = nil)
       message = "You have a nil object when you didn't expect it!"
       message << "\nYou might have expected an instance of #{klass}." if klass
-      message << "\nThe error occured while evaluating nil.#{selector}" if selector
+      message << "\nThe error occurred while evaluating nil.#{selector}" if selector
       
       raise NoMethodError, message, with_caller || caller
     end