We've got a problem using IE6 on Server 2003 SP1 - IE6's Trusted Sites list
got empty. As a result we cannot work correctly with some sites.

The server is a Domain Controller without IE Enhanced Security feature.
We use GPO to set some sites in Trusted Sites list.
This worked perfectly until yesterday. I verified - the group policy applies
normally.
In the registry there is the key that specifies site list:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Internet
Settings\ZoneMap\Domains
but IE 6 says: "No sites are in this zone"