Bug with x11(), Lion and CRAN R 2.13.1

This is not peculiar to Lion: it does seem something about Apple's X11 
notifier and I've seen it quite often over the years on Leopard ...

Hello,

I have just installed R 2.13.1 on a clean install of Lion on a 3 year old iMac with a 2GHz Core 2 Duo. When I run R in the terminal and use the x11 device I get some strange behaviors when I call the dev.off() function. If I plot several times then usually I get the error:

   Error in dev.off() : parameter "i" in "mfg" is out of range

and if I plot only once I get the warning:

   Warning message:
   In dev.off() : Display list redraw incomplete

In both cases, a new x11 window opens (not exactly the expected result of dev.off). Steps to reproduce both cases are given below.

Also, it seems that the x11 device is not 3-4 times faster than the 
quartz device. Has anyone else noticed this?
Why would you expect it to be?  X11(type='Xlib') is, but that is no 
longer the default on OS X.
Cheers,
Kjell

## (re)start R ##

x11()
system.time(demo("graphics", echo = FALSE))
  user  system elapsed
 0.213   0.025   0.517
dev.off()
Error in dev.off() : parameter "i" in "mfg" is out of range
dev.cur()
X11
 3
dev.off()
null device
         1
dev.cur()
null device
         1

sessionInfo()
R version 2.13.1 (2011-07-08)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
[1] tools_2.13.1

## (re)start R ##

x11()
plot(1:10)
dev.off()
X11
 4
Warning message:
In dev.off() : Display list redraw incomplete
sessionInfo()
R version 2.13.1 (2011-07-08)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Bug with x11(), Lion and CRAN R 2.13.1

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