When you use the Publish tool to generate a chart, the created chart does not use any of the installed fonts. It creates bitmapped fonts. This is fairly obvious on the screen as it is not as nice looking as the rest of the program.
If you print out the chart or save to .PDF file, they are not as crisp as if you had done it on Windows or MacOS.
I have added Core Fonts and several other of the fonts available in Crossover without improvement in the font quality.