I'm the administrator of Bugzilla in Micron Catania (Italy) for Product Engineer Department and we have installed the 4.0 running on Windows Server 2008 R2. According to my customer requirements, I've the need to change two default fields from optional to required: "Orig. Est" (field name "estimated_time") and "Deadline" (field name "deadline" which type is Date/Time) respectively. As far as I understood I've to modify the templates: I guess that the involved one is "create.html.tmpl". Moreover, I suppose to add the required string into the "header.htmpl.tmpl" file but the real problem is how to manage the validation (I suppose) using a javascript (maybe inside the folder "js"). If so, unfortunately, I'm not able to do that ... otherwise I kindly ask if another choice is possible.