[R-SIG-Mac] saving a graph changes active quartz window?

[Carl Witthoft]

Setup:
    OSX 10.6.7,
R version 2.13.0 Patched (2011-05-25 r55988)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

Dumb question, maybe:
If I use <shift>-<cmd>-S to "save as" a quartz window, the graph is 
saved very nicely as a pdf, but the window in question is made inactive 
(and some other quartz window is set to active).

Is this intentional, or just some artifact of the save function closing 
a connection or something?

thanks
Carl