Matthew, yes, I am binding to NumericSeries, so, yes, we are talking about the same setup. Here is the code below

NumericDataPointCollection data = new NumericDataPointCollection();
foreach (DataRow row in dsArticles.Tables[0].Rows)
{
    data.Add(new NumericDataPoint(Convert.ToDouble(text), row[0].ToString(), false));
}
NumericSeries series = new NumericSeries();
series.Points.AddRange(data.ToArray());
this.chartArticles.Series.Add(series);

Ok, I'll try to bind it to DataTable. Just interested, when will the fix be released ?

It is entering QE shortly and if all goes well it would show up in the next SR which is scheduled for Dec 20th currently.  Good thing I ran another pass with the ColumnChart and the above snippet... there was another way to get into that area and I've now fixed it for your scenario (and any NumericSeries scenario for that matter).  I'm having Developer Support create a case and attach to Bug 159698 so you can be notified when the fix is released.  The fix would be for 13.1 and 13.2 just in case you did not know already. 

Probably would not be a bad idea to confirm with the Developer Support Engineer that what we discussed does indeed match up.  I'll let them know.

Also let me know if you encounter anything else in the Chart.

Mathew, Thanks. Just to inform you that I tried with binding datatable, and the problem occures again. I used simple code below:

DataTable mydata = new DataTable();
mydata.Columns.Add("Series", typeof(string));
mydata.Columns.Add("Column1", typeof(int));
mydata.Columns.Add("Column2", typeof(int));
mydata.Columns.Add("Column3", typeof(int));
mydata.Columns.Add("Column4", typeof(int));

mydata.Rows.Add(new Object[] {"New series", 150, 280, 80, 320});

ultraChart1.DataSource = mydata;
ultraChart1.DataBind();

Pic is in attachment.

Hi, I haven't had a chance to try update, so I'll test it in next few days, and confirm this thread. But I have no doubt it's working fine :)