I had the same Issue with 2.10.1. never got it resolved. I was hoping that
2.11 would fix it...alas

On Thu, Apr 29, 2010 at 2:59 PM, Seth Schommer <scschommer@gmail.com> wrote:

> I installed R 2.11.0 today and immediately came across an issue I did
> not experience using version 2.10.1.  For some reason, I can not use
> X11 in R.  Here's a simple example:
>
>
> > X11()
> Error in X11() : X11 module cannot be loaded
> In addition: Warning message:
> In X11() :
>  unable to load shared library
> '/Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so':
>  dlopen(/Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so,
> 6): Library not loaded: /usr/X11/lib/libpng12.0.dylib
>  Referenced from:
> /Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so
>  Reason: Incompatible library version: R_X11.so requires version
> 42.0.0 or later, but libpng12.0.dylib provides version 36.0.0
> > sessionInfo()
> R version 2.11.0 (2010-04-22)
> i386-apple-darwin9.8.0
>
> 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
>
>
> I'm running Mac OS X 10.5.8.  This error occurs when running R.app and
> while running R from the terminal.  After experience this I
> reinstalled 2.10.1 and tried the same command and had no problems.
> Just to make sure, I installed 2.11.0 again, and sure enough, I got
> the same error.  Is this a bug, or have I done something wrong?
>
> Thanks,
>
> Seth
>
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>

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