[Zope] zpt initial blank line

I'm not sure where to start with this one, so hopefully it sounds familiar to someone. I'm running Zope 2.7.0 and rendered page templates all seem to have an initial blank line. Unfortunately, my xml parser doesn't like that. Am I just seeing some bizzare behavior here, or have page template always been like that? I'd hate to have to come up with some hack to strip that line off someplace. Has anyone had to deal with this before? Thanks joseph