R help - Oct 2013 - How to set default font for lattice graphics?

I tried to change fonts for lattice graphics:

trellis.par.set(list(axis.text=list(fontfamily="Monaco"),
par.strip.text=list(fontfamily="Monaco")))

It works for axis.text but not for par.strip.text.
trellis.par.set() does not set par.strip.text neither strip.text while I
can change font for strip text using:

xyplot(0 ~ 0 | "Strip Text",
par.strip.text=list(fontfamily="Monaco"))

How do you change font for strip text globally at once?
Or can you change default font globally for all graphical elements?

thanks,
honza.

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