[R] R Cocoa won't load in Mac 10.3

[hadley wickham]

> I installed R-cocoa 2.0.0 using the binary installer package on Mac
> OS 10.3. When I try to start the program from the GUI I get the
> following error message:
> 
>     Unable to start R: R_HOME is not set. Please set all required
>     environment variables before running this program.


I had the same problem, which was solved with a reboot.
Hadley