This works:
<telerik:RadNumericTextBox ShowSpinButtons="true" runat="server" ID="Numeric1" Width="200px" IncrementSettings-Step="0.1" NumberFormat-DecimalDigits="1" Value="0.1"> |
<telerik:RadNumericTextBox ShowSpinButtons="true runat="server" ID="Numeric1" Width="200px" IncrementSettings-Step="0.1" NumberFormat-DecimalDigits="1" Value="0.1" MaxLength="3"> |
This is in 2009.3 (Jan release). Not sure if it's in 2010.1, since that just arrived.