R.app path and environment variables

Hi,

Where does R.app, when launched from the Dock, get its environment
variables from, including PATH?

I've tried setting the PATH in ~/.bash_profile and /etc/paths, but  
when
launched from the Dock, it doesn't get through:

system("echo $PATH")

/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

If I start R.app from Terminal using
/Applications/R.app/Contents/MacOS/R, it does show up:

system("echo $PATH")

/usr/bin:/bin:/usr/sbin:/sbin:/sw/bin:/usr/local/bin:/sw/sbin:/usr/ 
X11/bin:/usr/local/git/bin/:/usr/local/bin

I'm using R 2.7.1 on Leopard 10.5.4.

Thanks,
Gad

-- 
Gad Abraham
Dept. CSSE and NICTA
The University of Melbourne
Parkville 3010, Victoria, Australia
email: gabraham at csse.unimelb.edu.au
web: http://www.csse.unimelb.edu.au/~gabraham