I also just hate how menubars (do not) work on mac Os X. However with
all problematic stacks I had the problem went away with hiding the
menubar group. So I have something like this on preopenstack
on preOpenStack
if "mac" is in the platform then
hide grp "myMenus"
else
show grp "myMenus"
end if
end preOpenStack
Hope that helps,
Malte