Permission Denied Error with X11

Hello,
I am using Tiger 10.4.11
I am trying out the GIMP, so I installed the X11 package from "Optional Installs" on the cd.
Whenever I open X11, I get an error:

xterm: could not exec /dev/null: Permission denied

I have chmodded /dev/null to 777, as well as the /tmp directory.
I deleted /.xinitrc in my home directory, but as soon as I opened X11 again the .xinitrc file was recreated but still getting the same error.
I really have no idea what's going on...
Here is a link to what the error looks like:
http://img294.imageshack.us/img294/4884/xtermgx7.png
Thanks in advance.

that would appear to be an installation bug. I cannot address Tiger specifically, but trying to execute "/dev/null" should never happen.

Do you get a similar message when you open the Terminal application?
(/Applications/Utilities/Terminal)

If so, the shell specified for your account is /dev/null. Essentially, no shell access.

Also, check Software Update for an update to X11. I seem to recall there were some X11 updates supplied that way. Even if you have no shell access it is a good idea to make sure your software is up to date.

If you still have issues with /dev/null, you'll need to delve into your account info in NetInfo Manager (/Applications/Utilities/Netinfo Manager)

Look for an entry called shell and see what its value is. If the value is /dev/null, change it to /bin/bash (or whatever shell you would prefer).