The following bugs are known to exist in Mn_Fit 4.02/19:

1) There is no protection against trying to draw more than 50 items.

2) If you use `HIST FILL' and use the contents of another histogram in
the command, Mn_Fit can get confused:

Suppose histogram 2 is a normal binned histogram and you want to make
an unbinned histogram with the same x-axis:

set plot 2 default
book/unbin/err 1 'Title' 1 100
do i=1,r131
  dep r1 = @i
  dep r2 = 2*sqrt(i)
  fill 1 x2(@i) r1 0.0 r2
enddo

This will not work. You have to do the following:

set plot 2 default
book/unbin/err 1 'Title' 1 100
do i=1,r131
  dep r1 = @i
  dep r2 = 2*sqrt(i)
  dep r3 = x2(@i)
  fill 1 r3 r1 0.0 r2
enddo
