1. Scroll to near the bottom of grid.
2. Refresh the Grid, populating it with less items.
3. Should see mostly blank grid besides for bottom row.
4. If you scroll any the rows show back up.

The grips on the scrollbar's thumb is blurred on 120dpi as well as some of the borders.

As it turns out, we hit a WPF specific problem with 120 DPI. The issue is similar to the following:
http://connect.microsoft.com/VisualStudio/feedback/details/798513/wpf-dpi-rendering-issues-with-two-borders
For the time being this issue is not addressed and most probably would not be fixed. 

As a workaround, one can look this up by accessing the Object/DbContext directly.

All DragVisualProviders for the RadListBox, as described in http://www.telerik.com/help/silverlight/radlistbox-features-dragdrop.html, show as a bare minimum a horizontal line that clearly shows where the drop within the list will occur.

Unfortunately the RadGridView does not even have that out of the box for its DragVisualProviders, so dragging elements within a RadGridView provides no indication at all to where the drop will happen! This seems like a very basic feature the RadGridView should have to support dragging/dropping within it (which also seems like a very common functionality).

Add Option to disable autoBring into View the focused RadGridView unit.

Add the "does not begin with" and "does not end with" to the list of filter parameters

The RowStyleSelector is great for dynamically styling rows, but there doesn't seem to be an easy way to dynamically apply a style to selected rows - they just take on the default style. Something like a SelectedRowStyleSelector would be a great way to dynamically style selected rows. Thanks!

Add an option to clear all filters at once to the column filters.

When dealing with Date column filters show available options (similar to text filters) and support grouping based on Year, Month. This is a very handy feature of Excel.