Apologies to those who downloaded the 0.5.3 release and found the readme.txt file confusing (the instructions for running the demo, specifically). I've corrected this, and also added in a bug fix for clipping in LinePlot and XYPlot, so now it is version 0.5.4!
Note that when you extract the files from the download, they will end up in a directory called jfreechart-0.5.4, so as not to overwrite any of your existing JFreeChart files.
The PDF documentation is now out of date in some sections - it will be updated for version 0.6.0, coming soon...
Regards,
DG.