I have a column in my grid which displays a button.  For some reason the button displays in the column but with additional padding that I can't figure out how to remove.  I also use DataGrid in other forms and I don't get this spacing problem.  Here is the xaml for the column

<igGrid:TemplateColumn Key="*"  Width="32">
                                <igGrid:TemplateColumn.ItemTemplate>                                   
                                    <DataTemplate>
                                        <Grid Width="32">
                                        <Button Click="Button_Click" Width="32" ToolTipService.ToolTip="Click to rollback" Padding="0"
                                                Visibility="{Binding  Path=Customized, Converter={StaticResource rollbackVisibilityValueConverter}}"
                                                Style="{StaticResource rollbackImageContent}">
                                        </Button>
                                            </Grid>
                                    </DataTemplate>
                                </igGrid:TemplateColumn.ItemTemplate>
                            </igGrid:TemplateColumn>

The button displays an image, and its width is 32.  In a regular datagird, the button fills the entire column perfectly when I set its width to 32.  In the XamWebGrid I have to make the width 42 because there appears to be a bunch of spacing/padding around the button.

Any help would be greatly appreciated.