I have recently tried your software version 1.9. This is quite nice and thank you for providing it.
I am just trying to create some simple, mathematically defined line drawings using the SVGGraphics2D class that will be viewed in a few different contexts. I notice that the SVG output for this class uses 'rgba(r,g,b,a)' for defining color in styles. This seems to work fine in up-to-date web browsers, but some other applications (e.g. Inkscape 0.48, Gimp 2. do not seem to interpret this properly or at all. For my limited purposes, I can just use the source code and change the call in svgColorStr() from rgbaColorStr() to rgbColorStr() (since opacity is being specified separately anyway), so I do not need to request a 'fix'. But if you are interested in this feedback, here it is.
Thank you again