GTK theme engine path

[Brian Clark <bc viz tamu edu>]

I had GTK running on OSX through an X11 window.  I wanted meld, so I 
used fink commander to download it, but there were dependencies.  I 
told fink to go for it.
Six hours later, I apparently have most of gnome.  I don't care either 
way.  But when I launch my gtk apps, I now get a warning about not 
finding the themes (at least I hope it's that simple).  Or by "theme 
engine" does it mean that it can't find the application to parse the 
themes?  I assume I need to set a path, but I don't know where that's 
located nowadays.

Here's the warning, by the way.  It repeats about 10 times.
(gct:655): Gtk-WARNING **: Unable to locate theme engine in 
module_path: "pixmap",

Can anyone tell me which file the path is located in, or if that 
doesn't appear to be the problem, what I should do?

Thanks,
Brian