1. I can see an icon on the left hand side when I edit a row and it usually goes away when I switch to an another row. The rows with the "locked" cells have this "editing icon" all the time. That is, even if I switch to another row, the icon doesn't go away and I can no longer edit any cells in that row.
2. If I click on any cell in the rows with this issue, the text in the cell momentarily disappears. I can still enter in new text but of course it doesn't persist. If I move out of the cell, the old value comes back. In a normal cell, when I click on the cell, it will still retain the existing text and I can edit it.
3. I am not doing anything particularly fancy with the grid. I am hooking into the CellValidating event to convert any newly entered text to lower case (business requirement). Here's the code:
   
   private void GridView_CellValidating(object sender, Telerik.Windows.Controls.GridViewCellValidatingEventArgs e)

           {          

               if (e.OldValue != e.NewValue)

               {

                   ((System.Windows.Controls.TextBox)(e.EditingElement)).Text = e.NewValue.ToString().ToLower(System.Globalization.CultureInfo.InvariantCulture);

                   IsEdited = true;

               }

           }
4. This is the markup of the grid:
   
   <local:EquipmentsGridView x:Name="uxStowList" ListType="StowList" Deleting="OnDelete" SelectionMode="Extended"  CanUserInsertRows="True" ShowInsertRow="True"  ShowGroupPanel="True" telerik:StyleManager.Theme = "Office_Blue"

                                   IsFilteringAllowed="True" AutoExpandGroups="False"

                                       EditTriggers="CellClick" RowLoaded="ListRowLoaded" RowEditEnded="Gridview_RowEditEnded"  ColumnWidthChanged="uxStowList_ColumnWidthChanged" DataLoaded="uxStowList_DataLoaded" HorizontalAlignment="Left" VerticalAlignment="Top">

                                       

                                 <telerik:RadGridView.Columns>

                                          <custom:GridRowNumber Header="#" Width="50" />

                                          <telerik:GridViewColumn>

                                              <telerik:GridViewColumn.CellTemplate>

                                                  <DataTemplate>

                                                      <telerik:RadRibbonButton SmallImage="Resources\CrossIcon.png" Command="telerikGrid:RadGridViewCommands.Delete" CommandParameter="{Binding}" Name="btnDeleteStowList"  Click="btnDeleteStowList_Click" />

                                                  </DataTemplate>

                                              </telerik:GridViewColumn.CellTemplate>

                                          </telerik:GridViewColumn>

                                          <telerikGrid:GridViewSelectColumn></telerikGrid:GridViewSelectColumn>

                                      </telerik:RadGridView.Columns>

                                  </local:EquipmentsGridView>
   EquipmentsGridView is inheriting from RadGridView and the RowEditEnded event isn't doing anything to the grid.

I am binding programatically to a GridViewComboBoxColumn (see C# below) and I am using the CellTemplate to display a RadComboBox instead of text.  The problem is that I do not know how to set the ItemSource for the RadComboBox in order to make it work.  Thanks in advance for any help!