text() does not work

When plotting, no text appears in the Quartz window (no axis labels, etc.) and
text() does not work:

plot(1:3,1:3, main="Hi!")

No main title appears a no axis labels.

text( 2, 2, "w")

no "w" appears.

Earlier today I did a general software update.  I tried changing to the previous version
I was using, 2.8, but this did not help.

With

demo(graphics)

all plots appear, but no text at all.  I tested the png() device, and no text appears there either.


Please help.

Dr J Andres Christen            	Tel: +52-(473)-732-7155, ext. 49563
CIMAT
A. P. 402                       		Fax: +52-(473)-732-5749
36000, Guanajuato, Gto.         e-mail: jac at cimat.mx
MEXICO                          		http://www.cimat.mx/~jac

"Dort, wo man B?cher verbrennt, verbrennt man am Ende auch Menschen"
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"Where they burn books, they will ultimately also burn people"
Heinrich Heine (1797-1856).