[R] Postscript output encoding on Windows

[Jamie Lawrence]

With R 2.3.1 on Windows, I've noticed that it defaults to the 
"WinAsci.enc" encoding, which throws up an error when viewed with the 
default install of GhostScript/GSView (versions 8.51/4.7 respectively).  
I didn't have this problem prior to upgrading to 2.3.1 as I can view all 
my old PS graphs and they don't have the WinAsci encoding.  I've got 
around this problem by adding encoding="CP1251.enc" to the postscript 
call but it seems a little bizarre that the default WinAsci wasn't 
working. 

Any ideas what the problem might be?  A problem with Ghostscript, a bug 
in R, or something strange about my installation (there shouldn't be)??  
Should WinAsci be the default?

Thanks,

    Jamie