[6.4.0] PDF spotcolor conversion when outputting to jpg

[mirage]

Hello -

So I've just compiled the latest 6.4.0. I have ghostscript 7.0.7 installed - which might be part of the problem here. I know there's a later version [of ghostscript] available, but I wanted to make certain that I'm not overlooking a conversion switch or something.

Conversion of PDFs to JPEG works fine with documents I've tested. The only problem I've run into thus far is a document that makes use of [Pantone] spot colors. All items defined in that color appear as black in the output, rather than being converted to their composite (process-color) equivalents. When changing the output setting in Acrobat to process, it ripped fine.

So the question is whether there's a switch I need to apply in the conversion to pass on to ghostscript that I want all spot colors to be converted to their process equivalents.

I've uploaded the original (spot color) PDF to other services that are using ghostscript for the conversion and they converted it with me applying special treatment to the PDF. Which leads me to believe that it must be possible.

Thanks in advance for any tips.

[mirage]

Upgrading to the latest ghostscript (8.6.something) seems to have automagically fixed this.