textRollOverColor in Flex DataGrid

According to Adobe's documentation, the Flex DataGrid control supports the textRollOverColor CSS property. But this past week I discovered that this is not the case :( A quick search revealed that I'm not alone in this discovery, but it seems that no one has proposed a useful solution yet... so I went about creating my own :)

So, why doesn't it work as documented? Well, a quick check revealed that the relevant text colors are supposed to be set in the DataGridItemRenderer's validateNow() method. That method sets the item's explicitColor property, and then calls the super.validateNow() method to update the display. However, the super (UITextField) class' validateNow() method does not update the text format unless the styleChangedFlag property is set - but that flag is not being set. Since the styleChangedFlag property is marked as private, I can only assume that it is meant to be set by the relevant setter functions, but as there is no setter function for the explicitColor property, the styleChangedFlag is not set.