Joel doesn't really examine any of the down sides to sticking with the MS font renderer. It might cause problems with Safari internals, since various DOM compon

Joel doesn't really examine any of the down sides to sticking with the MS font renderer. It might cause problems with Safari internals, since various DOM components and style attributes will depend on font sizes and spacing. It might add to the annoyance of web development, since Safari on Windows wouldn't do the same thing as Safari on Mac. However, I suspect they had to work around tons of similar issues, anyway.