The DataType property of GridViewComboBoxColumn does not work as expected in the following scenario:

1. Set DataSource to GridViewComboBoxColumn so that the ValueMember of the column is of type Integer.
2. Set the DataType property of the column to Decimal.
3. Set DataSource of RadGridView so that the FieldName of the above GridViewComboBoxColumn is of type Decimal.
4. RadGridView throws exception.

Incorrect RadGridView behavior when changing sorted GridViewCheckBoxColumn checkboxes states.

The RadGridView pinned columns remain in the collection when the corresponding columns are removed from the control.

The format specifier 'tt' in the ExcelExportFormatString property should be outputed as 'AM' or 'PM'.
For the formatting to work correctly the users have to set the property to Excel format codes not .NET format strings.
Here is the list of excel's format  codes: http://office.microsoft.com/en-us/excel-help/number-format-codes-HP005198679.aspx

SortDescriptors does not apply when they are added to control with no DataSource defined and no rows added. The added rows from the user are not sorted.

The RowForeColor property of a conditional formatting object does not apply to the column which the condition is defined for.

Steps to reproduce: 
1. Start RadControls for WinForms Q1 2011 Demos 
2. Open RadGridView/Indicate Errors demo application
3. Stretch column Position dragging the right border of the column to right till the end of the screen
4. Stretch column City dragging the right border of the column to right till the end of the screen
5. Scroll on the right to column Phone
6. Scroll back to column Name
6. Point to field King, Robert
7. Incorrect error message "This is not a valid email!" appears

When the value of the editor is deleted using the Delete key, the events are not fired.

The bottom-positioned 'new row' has incorrect state after it has been previously initialized and a parent row of the grid is expanded and collapsed several times.

Exception occures when you have applied excel-like filtering and load layout.

When you select the cells of a pinned column and this column overlaps the next column, the cells from the next column are selected too.

RadGridView loses the multiple selected rows when it has a sorted column and a cell value is edited.

The summary row values are not updated in the following scenario:
1. Group by one column and expand one group row.
2. Remove this grouping.
3. Group by second column in a way it creates a group with the same value as the one of the previously expanded group.

Setting RadGridView CurrentRow to a child row should make the control scroll to this row. This is the control behavior when setting row from the MasterTemplate as CurrentRow.

To reproduce the issue:
1. Use the designer to set ShowRowHeaderColumn property to 'false'.
2. Set the property value back to 'true'.
The serialized value of the property will remain 'false'.

The last RadGridView column has incorrect cell spacing.

Selection should not be processed while scrolling the control and the mouse hovers RadGridView rows.

The RadGridView ScrollToRow functionality does not work correctly when the target row is in child hierarchy view.
COMMENT: Actually this is not a bug. The described method should check whether the lastRow field is expanded. If it is not expanded, the method should expand the row, or it should ignore it.

Adding SortDescriptor to RadGridView and then including the control to the Controls collection of a form makes the descriptor to disappear.

IMPROVE. RadGridView - when sorting grouped combo box column the DisplayMemberSort is not taken into consideration