[OS X TeX] epstopdf can't find Ghostscript

[Tom Stace]

I've recently installed ghostscript 8 using the i-installer program, 
and I find now that the epstopdf package breaks.  When I now include a 
figure for which a pdf version does not exist, epstopdf tries to 
convert it, but fails, and returns the error:

"Error: Cannot open Ghostscript for piped input!"

I have looked around and the gs command works within the terminal, with 
no problems, so why can't epstopdf find it?

Thanks
Tom

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