Editing logon banner policies that were created on a Windows 2000 system with Windows XP or 2003 can cause the message text to be displayed incorrectly on some Windows XP systems.

The GPanswers.com forum is closed now (thanks, spammers!)
But we encourage you to join us at LinkedIn in the “GPO Stuff” group.
Jeremy is regular there, and there is a reasonable system to prevent junk posts.
In all, we think it’s the right place to go for Group Policy-specific questions.
It’s a private group, but just JOIN it, and the owner should approve your request.
See you there !
-Jeremy Moskowitz, Group Policy MVP