First, congratulations! MathMod is a nice successor to K3DSurf.
I know that MathMod is still beta but this minor problem might persist if it isn't fixed now: the interface is not quite readable with dark themes. The reason is the use of custom palettes in drawingoptions.ui. With dark Qt themes, they may show black text on dark background or white text on yellow background.
I am on Linux (Debian).
Hi Tsu,
Please try the last source code with the Dark Qt Themes, it should be ok now
Thank you for your report
Abderrahman