[Therion] colour preview-above unresponsive

While we are going through a renaissance of Therion improvements, I'm wondering if anyone is able to look at the colour preview-above functionality? I can make 'colour preview-below' work, but not 'colour preview-above'. colour preview-below 80 #0 = black 100 = white. This works just fine. colour preview-above 80 #seems to be ineffective, and the preview outline remains black. I have a long running statement colour preview-above [80 0 40] #magenta designed to alert me to the moment that this feature is fixed :) Bruce