Duplicate rows in DataGrid in Flex3/LCDS2.5

Question

Hi,
My project in Flex2/LCDS2 uses DataGrid very extensively with
streaming data coming in.
After we recompiled it with Flex3 and run with LCDS2.5, we
see a strange behavior:
originally it shows everything right, but all coming data
creates duplicate rows.
As soon as we do sort on any column, duplicates disappear.
But then again new data creates duplicate rows...
We have never seen that happening with Flex2,
in fact it's running fine in production for a few months.
Has anybody seen such behavior ?
How can we cure that ?
(we do not do any special processing on that data, so I
really doubt it's anything in our code)
(using Java 1.5 on the server).
Any help is very appreciated.
Thank you in advance,
Oleg.

Answer 1

Just make sure you are not adding duplicating objects to your array collection.
It happened to me but figured it out.
If you have a loop that checks make sure you do the addIteam(obj); outside the inner loop but within the outer loop
for each (......)
      var match:boolean = false;
     for each(....)
               if(....)
                    match = true;
/** this is out side the inner loop */
          if(!match)
               array.addItem(obj);
     } /** outer loop ends here