EditorGrid and trackMouseOver bug

[pex]

I found a bug in the grid. When you have trackMouseOver set to 'true' and an instance of EditorGrid, then double clicking on a field gives an error in FF2.0.0.3

[jack.slocum]

trackMouseOver is not compatible with a CellSelectionModel - are you using a CellSelectionModel?

[pex]

Im using RowSelectionModel (for completeness sake, here is the code)

new Ext.grid.RowSelectionModel({singleSelect:false})

[jack.slocum]

It has to do with focusing and mouseover at the same time. It should be disabled on the EditorGrid (I know it's off by default).

trackMouseOver: false, // causes very odd FF errors

The problem is there is no way to debug it since it's an internal FireFox error. I spent quite a bit of time on it (buttons + input occasional throw the same error). It should be transparent to end users, but it is something I intend to post to the FF bug list and see if I can get some kind of idea on how to work around it.