firefox/thunderbird printing problems with latest fontconfig

[Mark Davies <mark%mcs.vuw.ac.nz@localhost>]

Is anybody else having problems with firefox and thunderbird segfaulting after 
printing when used with the latest fontconfig package?

firefox will reliably segfault for us straight after printing any web page 
(that has text on it).  The top of the backtrace is:

#0  0xbb5def62 in IA__FcCharSetDestroy () from /usr/pkg/lib/libfontconfig.so.1
#1  0xb3c61d7d in nsFontMetricsPS::~nsFontMetricsPS() ()
   from /usr/pkg/lib/firefox/components/libgfxps.so
#2  0xb3c61e07 in nsFontMetricsPS::Release() ()
   from /usr/pkg/lib/firefox/components/libgfxps.so
#3  0xbad7e099 in nsFontCache::Flush() () 
from /usr/pkg/lib/firefox/libgkgfx.so
#4  0xbad7dc00 in nsFontCache::~nsFontCache() ()
   from /usr/pkg/lib/firefox/libgkgfx.so
#5  0xb3c618cd in nsFontCachePS::~nsFontCachePS() ()
   from /usr/pkg/lib/firefox/components/libgfxps.so
#6  0xbad7c5d8 in DeviceContextImpl::~DeviceContextImpl() ()
   from /usr/pkg/lib/firefox/libgkgfx.so
#7  0xb3c60830 in nsDeviceContextPS::~nsDeviceContextPS() ()
   from /usr/pkg/lib/firefox/components/libgfxps.so
#8  0xbad7c26a in DeviceContextImpl::Release() ()
   from /usr/pkg/lib/firefox/libgkgfx.so
#9  0xb3c60b0f in nsDeviceContextPS::Release() ()
   from /usr/pkg/lib/firefox/components/libgfxps.so
#10 0xbbac0dd8 in nsCOPtr_base() ()
   from /usr/pkg/lib/firefox/libxpcom_core.so
#11 0xb4b21767 in nsPrintData::~nsPrintData() ()
   from /usr/pkg/lib/firefox/components/libgklayout.so
#12 0xb4b18098 in nsPrintEngine::Destroy() ()