Different output when run from the debugger vs. the command line

When I run the following script from the command line, I get different
output than when I run it with the debugger.

#!/usr/bin/perl
use Config qw(myconfig);
print Config->myconfig;
1;

Here is the relevant differences in the output:

From the debugger:
 uname=3D'linux lxcert-i386.cern.ch 2.4.21-27.0.2.el.cernsmp #1 smp thu
jan 20 01:37:09 cet 2005 i686 i686 i386 gnulinux '

From the command line:
 uname=3D'linux lxc'

Why would this happen?

Perl and OS Info:
This is perl, v5.8.0 built for i386-linux-thread-multi (with 1
registered patch, see perl -V for more detail)=20

Linux localhost.localdomain 2.4.21-37.ELsmp #1 SMP Wed Sep 7 13:28:55
EDT 2005 i686 i686 i386 GNU/Linux