Using RadDiagram with Zoom, does text get scaled?

[Pete]

The problem I'm seeing is that text does scale up or down, just sometimes it seems to jump to a large size - is this a feature of RadDiagram? I note that if I set the scale back to 100%, the text is now much bigger. I've attached pictures to demonstrate.

now zoom out:

the text is bigger, to be readable? Now go back to 100%:

the text is now huge.

[Pete]

Found it - the labels get scaled separately, nothing to do with zoom.