Mapped Network Drives in Internet Zone

I've got an odd one for you all. I have about 100 XP SP2 workstations in a
Multi-Site AD environment. I rolling out IE7 to our machines and I have
noticed an strange behavior on the IE7 machines that I cannot seem to fix. I
have the security zones setup in IE as the following (I've anonimized the
names):
Intranet Zone:

• *.parent.net
• child.parent.net
• *.child.parent.net
• servername.child.parent.net

Essentially I put all machines in the parent domain and the child domain in
the Intranet Zone. Now the weirdness beings, when I type in the UNC
"\\servername.child.parent.net\share" windows explorer tells me it is in the
Intranet Zone, however when I map a drive to that same UNC path windows
explorer tells me it's in the Internet Zone.

I found a MS KB (http://support.microsoft.com/kb/303650) that states UNC
paths with dots in them (IP Addresses & FQDNs) will always appear in the
Internet Zone even though you have defined them in the Intranet Zone, but
then why are my UNC paths displaying as in the Intranet Zone? I assume this
is because I have enabled the "Intranet Sites: Include all network paths
(UNCs)" in my IE Settings GPO.

Has anyone run into this and figured out a way around it, or am I stuck? I
would just reference all my network resources by their netbios name as the KB
suggests, but we're in the multi-domain environment and accessing servers
from the parent domain requires the FQDN.

Thanks for the help!