This is not browser specific - the behavior exists in Firefox and IE. The RadControl is being used within a User Control in a SiteFinity site.

Very little customization has been done to the control.

<telerik:RadDateTimePicker ID="RadDateTimePicker1" runat="server"
     MinDate="2010/1/1" Width="250px">
      <ClientEvents></ClientEvents>
      <TimeView starttime="08:00:00" endtime="20:00:00"
           interval="02:00:00"></TimeView>
      <DateInput runat="server" ID="DateInput"></DateInput>
</telerik:RadDateTimePicker>

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        RadDateTimePicker1.MinDate = DateTime.Now;
    }
}