[R-SIG-Mac] font configuration unstable

[Chip Stewart]

My R.app (R 2.4.1 GUI 1.18 (4038)) console and internal editor changed 
themselves to use an unreadable tiny font following an R crash 
yesterday.  The Format/Font dialog can make temporary changes to  larger 
fonts, but subsequent actions (including rebooting and/or restarting 
R.app) return to the unreadable tiny fonts. Is there an editable system 
file (Rprofile?)  that can use used to set the console  and editor font 
size?