problem with default radio property values?

[Ben Abbott]

I noticed that many default values are properly reported

        octave:2> get (0, "defaultaxesposition")
        ans =   0.13000   0.11000   0.77500   0.81500

        octave:3> get (0, "defaultaxesticklength")
        ans =   0.010000   0.025000

But some others are not

        octave:4> get (0, "defaultaxesunits")
        ans = 0

        octave:5> get (0, "defaultaxesfontunits")
        ans = 0

        octave:6> get (0, "defaulttextfontunits")
        ans = 0

        octave:7> get (0, "defaultaxestickdir")
        ans = 0

From what I can tell all radio properties behave this way. I  
experimented with placing ...

        units = "normalized";

... in axes::properties::set_defaults, but the behavior did not  
change. Nor does it work for the other radio properties whose defaults  
are already specified there.

Is this a bug, or the result of a work in progress that has not yet  
been completed?

In any event, is there presently a way to determine the default value  
for a radio property from an m-file?

Ben