Thanks. I had a look at the thread you posted.
Me being me I go with the principle that it is working okay with NetPBM as is so I can live with that .
Can I ask why you want it to work with ImageMagick (other than the fact it does not at the moment)?
Opinions are my own views, not DreamHosts'.
I am NOT a DreamHost employee OK!! :@
You act on my advice at your own risk!