I decided to set some of my text boxes with the Distribute option of Text Align. This gives nicely justified text.
However, if there is a Scroll Bar present, the text becomes jagged again. So, now I have an inconsistency in appearance between the text boxes that need a scroll bar and those that don't.
Anyone come across this before and know if this is a feature or a bug? If so, its yet another annoying little niggle.