Last login: Wed Mar 21 20:10:33 2012 from astrolab17.astro.washington.edu 1 td% nautilus &  9847 2 td% Initializing nautilus-gdu extension
And then I quit nautilus.
The thing is, though, that putting the & operator at the end of nautilus, I'm supposed to be able to enter new commands after I close (or 'X' out of) the nautilus window. This happens with most other programs like Matlab. Except that this doesn't happen with Debian.
The distribution involved is Debian 6.0.4.