Index: app/models/version.rb
===================================================================
--- app/models/version.rb	(revision 3629)
+++ app/models/version.rb	(working copy)
@@ -53,7 +53,7 @@
   
   # Returns the total estimated time for this version
   def estimated_hours
-    @estimated_hours ||= fixed_issues.sum(:estimated_hours).to_f
+    @estimated_hours ||= fixed_issues.inject(0){|sum, issue| sum += (issue.leaf? && issue.estimated_hours) || 0}.to_f
   end
   
   # Returns the total reported time for this version