Erratic TextFormat problem

Hi Guys,

I wrote a really nice DataGrid for Flash,
http://www.thecodebe...cript-demo.html

When you edit or update a row of data in the table it generates the textformat sometimes loses or fails to apply properly.

Specifically when editing the textformat gets lost from the end of the textfields contents sometimes, and when updating it sometimes gets lost too.

It's some sort of Macromedia bug given that it's happening to fields at random or not happening at all, but if anyone's got suggestions as to why it's occuring / how to fix it I'd like to know.

I've tried adding text to the textbox then reapplying the textformat after initially applying whatever textformat, but it hasn't made much difference.

Thanks
Ben