[R-SIG-Mac] installation of source library with fortran code

[Gareth Janacek]

My version of R has taken to stopping  every now and again with the 
following error

2004-11-22 09:21:45.928 R[1428]
  *** NSTimer discarding exception 'NSInternalInconsistencyException' 
(reason 'dataRepresentationOfType: is a subclass responsibility but has 
not been overridden.') that raised during firing of timer with target 
3b0ff0 and selector 'runRELP:'

I'm running OS X 10.3.6 and am at a loss as to where to start tracking 
this. Any suggestions?
G.J.