"There's a project underway in Fedora 12 to finally resolve the issues
with Red Hat including #!/usr/bin/env python in our python executables:
There's also a Fedora bug opened on this, and comments in there state that this
is a big priority for RHEL6:
For RHEL5, we've been instructed by Product Management to open bugs on a
package-by-package basis to address the problem.
In this case, yum-rhn-plugin in RHEL5 has at least one instance of a
python script containing #!/usr/bin/env python"
It has been fixed in spacewalk some times ago. And in recent yum-rhn-plugin in RHEL5.4 it is not present:
[msuchy@dri/~]$ rpm -ql yum-rhn-plugin | xargs grep /usr/bin/env
[msuchy@dri/~]123$ rpm -q yum-rhn-plugin