[R-SIG-Mac] R crashes on opening of script

[alpinemappingguild at earthlink.net]

Map PowerBook G4
OSX 10.4.7
R Version 2.3.1 (2006-06-01) 3819 

New user here, some positive experience with R in Windows O/S, but so far no luck with Mac version.
Installed R but experiencing persistent and repeated crashes when trying to open script files or creating a new. empty document from the console or using File>new document. Application waits a few seconds, then SBOD, then crash. Not sure how to retrieve crash report but any help would be much appreciated. 

mg