I made a simple modification to UXGridView C# Sample Using DevForce project. The detail modification is as follow.

1. Open the project (start > All Programs > Intersoft WebUI Studio 2012 R1 > WebUI Studio for Silverlight 5 > Development Samples > UXGridView C# Sample Using DevForce).
2. Find and open MasterDetailEditing.xaml in \Views\UXGridView folder.
3. In the XAML view, find the following line:
   

   <Intersoft:UXTextBox Text="{Binding UnitPrice, Mode=TwoWay}" Width="80"/>

   
   And replace the UXTextBox control with the UXCurrencyEditor.
   

   <Intersoft:UXCurrencyEditor EditMask="#0.00" UseEditMaskAsDisplayMask="True" Culture="nl-NL" Value="{Binding UnitPrice, Mode=TwoWay}" />

4. Save all changes and press F5 to run the project.
5. After the project loaded in browser, modify the url by adding “#/UXGridView/MasterDetailEditing”. For example: http://localhost:8650/Default.aspx becomes http://localhost:8650/Default.aspx#/UXGridView/MasterDetailEditing. This will open the MasterDetailEditing page.

For your information, I’m using ClientUI 7 build 1 which comes with the Intersoft WebUI Studio 2012 R1 and was unable to reproduce the reported problem in my local end. Should you find anything that I miss during my test, please feel free to let me know.