Text color auto-set to white in a filled shape

[Jason Hinze]

Greetings!

I'm trying to make solid-filled shapes with text inside of them,
but if the fill color is anything but the original default white,
the text color automatically changes to white the next time
the text is selected.

Any change whatsoever -- one degree of hue, one percent
of saturation, brightness or opacity -- will enable this automatic
text color "trigger", such that the next time I select the text,
it automatically changes to white.

I could imagine that this is an attempt to help keep text in
filled colors visible, but it is not only tremendously annoying,
but also inconsistent: if I retain the original default white fill
color for the shape, I can change the text color to anything,
including pure white, and it is never automatically changed
to black.

This behavior is causing me no end of consternation.  I'm
trying to move my graph-structured drawings to OmniGraffle,
but as I often use light-colored filled shapes for my nodes
the automatic white-text-color-setting makes all of my text
practially unreadable.

Any insights would be most appreciated.

Thanks,
Jason Hinze