Hi --
Do you mean the Design Checker? I'm pretty sure that was introduced with InfoPath 2007 (along with the logic inspector). You have IP 2003? If you have a copy of 2007 available to you, you can still open forms created with 2003. If you don't, and if your form isn't sensitive, or if the thing that is acting up isn't related to a data connection, you could attach your template and I could open it in 2007 for you....