The problem occurs from 2014 Q2.  It should be resolved with lib version 2014.3.1319.

It would be very nice to have a "transpose" functionality in RadGridView. There are ways to transpose data instead of GridView, but this way it would be difficult to configure bindings, styles and other parameters. PivotGrid isn't suitable in this scenario because of lack of editing.

There is an example of what is needed: https://rotatedwpfdatagrid.codeplex.com/. I was successfully using this example with a standard WPF DataGrid, but I don't know how to accomplish this in RadGridView.

There are already a few threads about this feature:
http://www.telerik.com/forums/transposing-columns-and-rows
http://www.telerik.com/forums/radgridview-can-be-transposed
http://www.telerik.com/forums/displaying-grid-data-in-column-row-format
http://www.telerik.com/forums/reverse-column-and-row-in-the-grid

Thank you!

The problem was initially reproduced by TestStudio users. It can also be reproduced with a codedUI test where the editor is searched by its AutomationID.

Error Message:

Microsoft.VisualStudio.TestTools.UITest.Extension.UITestControlNotFoundException: The playback failed to find the control with the given search properties. Additional Details: 
TechnologyName:  'UIA'
ControlType:  'Text'
AutomationId:  'CellElement_2_1'

These issues should be resolved with lib version 2014.3.1110.

We would like to have the ability to merge cells vertically with same content. Consider to do the same horizontally.

The problem will be fixed with Q3 2014 official version.

Resolved with lib version 2014.2.0825.

Resolved with lib version 2014.2.0825.

Resolved with lib version 2014.2.714.

Resolved with lib version 2014.2.721.

StackOverflowException is thrown when perfoming sorting, filtering or grouping on GridView bound to DynamicObject