diff --git a/app/models/issue_category.rb b/app/models/issue_category.rb
index c45e3aa..385c0ed 100644
--- a/app/models/issue_category.rb
+++ b/app/models/issue_category.rb
@@ -27,7 +27,7 @@ class IssueCategory < ActiveRecord::Base
   
   safe_attributes 'name', 'assigned_to_id'
 
-  scope :named, lambda {|arg| { :conditions => ["LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip]}}
+  scope :named, lambda {|arg| where("LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip)}
 
   alias :destroy_without_reassign :destroy
 
diff --git a/app/models/issue_status.rb b/app/models/issue_status.rb
index 95c7e4d..fe16157 100644
--- a/app/models/issue_status.rb
+++ b/app/models/issue_status.rb
@@ -29,7 +29,7 @@ class IssueStatus < ActiveRecord::Base
   validates_inclusion_of :default_done_ratio, :in => 0..100, :allow_nil => true
 
   scope :sorted, order("#{table_name}.position ASC")
-  scope :named, lambda {|arg| where(["LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip])}
+  scope :named, lambda {|arg| where("LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip)}
 
   def update_default
     IssueStatus.update_all({:is_default => false}, ['id <> ?', id]) if self.is_default?
diff --git a/app/models/version.rb b/app/models/version.rb
index 16db9f0..212ce85 100644
--- a/app/models/version.rb
+++ b/app/models/version.rb
@@ -35,10 +35,11 @@ class Version < ActiveRecord::Base
   validates_inclusion_of :sharing, :in => VERSION_SHARINGS
   validate :validate_version
 
-  scope :named, lambda {|arg| { :conditions => ["LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip]}}
-  scope :open, :conditions => {:status => 'open'}
-  scope :visible, lambda {|*args| { :include => :project,
-                                          :conditions => Project.allowed_to_condition(args.first || User.current, :view_issues) } }
+  scope :named, lambda {|arg| where("LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip)}
+  scope :open, where(:status => 'open')
+  scope :visible, lambda {|*args|
+    includes(:project).where(Project.allowed_to_condition(args.first || User.current, :view_issues))
+  }
 
   safe_attributes 'name', 
     'description',
@@ -79,7 +80,7 @@ class Version < ActiveRecord::Base
 
   # Returns the total reported time for this version
   def spent_hours
-    @spent_hours ||= TimeEntry.sum(:hours, :joins => :issue, :conditions => ["#{Issue.table_name}.fixed_version_id = ?", id]).to_f
+    @spent_hours ||= TimeEntry.joins(:issue).where("#{Issue.table_name}.fixed_version_id = ?", id).sum(:hours).to_f
   end
 
   def closed?