[flexcoders] Changing Row's font color

[fidelityphil]

I am using an in-stream itemRenderer to change the color of a font all 
across a row if a certain value shows up in one of the row's cells.  
That works fine, but then if I click on one of the headings to sort a 
column - the titles go blank and the application locks up.  Is there a 
way to turn off the itemrenderer for the duration of a sort and then 
turn it back on?  And will that keep the colored font in the correct 
row after the sort?