[FLEX-32307] CLONE -CLONE -Null Object Error "at mx.controls.listClasses::AdvancedListBase/mouseMoveHandler()" - I have tried the workaround, but am still getting this error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Fix Version/s: Adobe Flex SDK Previous
• Component/s: Advanced Data Grid
• Environment: Affected OS(s): Windows; Affected OS(s): Windows XP; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 07/Oct/08 08:33
• Updated: 15/Feb/09 22:27
• Resolved: 15/Feb/09 22:26

Description

Steps to reproduce:
1.Produce a ADG (I'm using selectionMode="multipleCells" ).
2.Create a filter that filters the ArrayCollection data bound to the dataProvider based on the value of a selected item from a combobox in the header
3.As the data is filtering, move the mouse around the data grid, where no data will be.
4.If you do this right the Error is thrown in the mouse event as the event tries to access a cell that no longer contains data.

I am able to reproduce this everytime.
I am using Flex Builder 3 (3.0.1.205647).

Actual Results:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.controls.listClasses::AdvancedListBase/mouseMoveHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\listClasses\AdvancedListBase.as:8076]

Expected Results:
No error.