OS X/Jaguar App Menu

I don’t have Jaguar (OS X 10.2) installed on any of my machines, but
I’m getting reports from beta testers that the app menu doesn’t appear
on Jaguar but works fine on 10.1.

Is this a known problem with a known workaround? I haven’t changed my
source code at all, but also haven’t grabbed the latest cvs source snap
shot (last checkout was about a month ago, but I don’t see anything in
the logs that immediately jumps out at me as a potential fix).