I'm receiving the following warning from b45:

WARNING: com.sun.javafx.css.parser.CSSParser linearGradient Using deprecated syntax for linear gradient at file:/C:/cygwin/home/mcintyre/src/tasklearning/bin/com/sri/tasklearning/ui/core/resources/PALCore.css[24,35]. Refer to the CSS Reference Guide.

However, I don't see any difference between my gradient declarations and those in the CSS reference guide. Also, if I copy the examples from the CSS reference guide they also generate the warning.

Here are my CSS definitions:
    -pal-SystemGray: rgba(204,204,204,1.0);
    -pal-SystemGrayDient: linear (0%,0%) to (0%,90%) stops (0.0,white) (1.0,-pal-SystemGray);