CultureSpecific properties in blocks - doesnt save value

Steps to reproduce

Steps to reproduce

1. Create a block like the below:

   [SiteContentType(

   GUID = "67F617A4-2175-4360-975E-75EDF2B924A7",

   GroupName = SystemTabNames.Content)]

   [SiteImageUrl]

   public class EditorialBlock : SiteBlockData

   {

         [Display(GroupName = SystemTabNames.Content, Order=2)]

         [CultureSpecific]

       public virtual XhtmlString MainBody { get; set; }

          [CultureSpecific(false)]

          [Display(Order=1)]

       public virtual string Heading { get; set; }

   }

   Add it as property on a page type. Render it in the view with

2. @Html.PropertyFor(x => x.CurrentPage.MyEditBlock)

    

3. Create a page with two langauge branches.

4. Enter a value in MainBody for the secondary language, by clicking on the property in inline edit mode, enter value and save.

   
   
   Expected: That value will be saved
   
   Actual: That value will not be saved.

Note: This problem doesn't happen if Heading property's order is after MainBody one