Finally starting to feel productive in ProjectLibre but now my Gantt has grown larger than my screen I find that scrolling is really very sluggish. I'm running on OSX with plenty of free memory. Performance in all other apps is perfectly fine. The only other app with very slow scrolling is Aptana which I believe is also Java based? I've tried running ProjectLibre with the command line arguments: "java -Xmx2048m -Dsun.java2d.opengl=true -jar projectlibre.jar" but this has made no difference.