The rc.local file only gets executed on multi-user startup as far as I 
know.  It sounds like you either need to reboot or drop to single-user 
and restart the multi-user session (I have tried to source this script 
before, but always get errors).
bak

On Mon, 5 May 1997, David JunQuan He wrote:
[snip]
> executed startx and it said, "/usr/libexec/ld.so: xinit: libXext.so.6.1: no
> such file or directory".
> I have edited the /etc/rc.local file corrected and I created a .xinitrc
[snip]