It's really annoying that the Mozilla build number is in the application name,
i.e., the name that shows up when you run "xwininfo" on the Mozilla window or
that twm uses for the Mozilla icon. This makes it very difficult to customize
the Mozilla icon in twm, since twm icon customization is based on the
application name. I'd rather not be editing my .twmrc file every time a new
mozilla build comes out!
Fixed in the 1.0.1 pre-release builds.