[R] pdf device --- axes labels text disappeared?

[ivo_welch-rstat8783@mailblocks.com]

Dear R Wizards:  Running R 1.9.1. on amd64.


Promise<- c(0,20,40); Expect<- c(0, 20, 0.2*20+.8*40 );

# this omits printing numbers on the axes labels.
pdf(file = "bug.pdf" );
plot(Promise, Expect, type="b", ylim=c(0,60));
dev.off();

# this works
postscript(file = "bug.eps" );
plot(Promise, Expect, type="b", ylim=c(0,60));
dev.off();


apologies if this has already been noted elsewhere---I looked but did 
not find it.  (probably googled for the wrong terms, if so.)  is this 
my bug, or R's bug or my R installation bug?  help appreciated.

/iaw