[magick-users] Need help with -modulate

[Chris Gentle]

Hi.  I need some help using the -modulate option.  I use modulate to
"clean up" some dirty looking scans that my old scanner produces.
After I upgraded to Ubuntu Jaunty (imagemagick version 6.4.5)  I
noticed that the behavior of -modulate changed.  The command I'm using
is basically this:

convert original.tiff -flatten -depth 8 -modulate 140 new.jpg

Imagemagick version 6.3.7 in Ubuntu Intrepid produced the following:

http://home.hiwaay.net/~gentlec/20090613-160502.jpg

After upgrading to 6.4.5 in Jaunty I now get this:

http://home.hiwaay.net/~gentlec/20090613-160105.jpg

I'm definitely not an imagemagick expert.  If the -modulate command
has changed, is there any way for me to reproduce what it was doing in
earlier versions?

Thanks!