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https://issues.apache.org/jira/browse/FLEX-33721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13761822#comment-13761822
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Mark Kessler commented on FLEX-33721:
-------------------------------------

Please provide a working example of the issue.  It may have already been 
resolved with Flex 4.10.


                
> Flash Builder Scroll Issue
> --------------------------
>
>                 Key: FLEX-33721
>                 URL: https://issues.apache.org/jira/browse/FLEX-33721
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: mx: ComboBox, mx: DataGrid, Spark Components
>    Affects Versions: Adobe Flex SDK 4.6 (Release)
>            Reporter: Kevin Pereira
>
> We have a Flash Builder project that contains a module that will be loaded 
> later through an AIR application, there are several screens on it, in one of 
> them there is a spark spark dataGrid with multiple columns GridColumn. 
> Some of these columns have associated itemRenderers these itemRenderes are 
> created in separate files based on elements GridItemRenderer Spark, within 
> them there is a spark ComboBox component when the user selects a value from 
> comboBox, GridItemRenderer itself updates the value of "data" with the new 
> selected value.
> The problem comes when you scroll at the datagrid, the values of these 
> columns "dance" from line to line; we´ve tried to solve this problem using a 
> itemEditor and a itemRenderer at the columns but in initializing itemEditor 
> gave us null pointer to initialize the moduleFactory the defaultItemEditor.
> Finally we had to change the dataGrid and use mx components to achieve 
> properly run our screen.

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