-* Mac Crash On quit (Bennett).
-Here's the backtrace:
-#0 std::string::compare (this=0x65646f75, __str=@0xdab7edc) at /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_lang_gcc42/work/build/powerpc-apple-darwin8.8.0/libstdc++-v3/include/bits/basic_string.h:595
-#1 0x006052ec in std::operator< <char, std::char_traits<char>, std::allocator<char> > (__lhs=@0xda5da00, __rhs=@0xbffff0d8) at /opt/local/include/gcc42/c++/bits/stl_pair.h:2217
-#2 0x0070421c in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<lyx::graphics::CacheItem> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<lyx::graphics::CacheItem> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<lyx::graphics::CacheItem> > > >::find (this=0x11e8eb70, __k=@0xbffff0d8) at /opt/local/include/gcc42/c++/bits/stl_tree.h:1376
-#3 0x007042c0 in std::map<std::string, boost::shared_ptr<lyx::graphics::CacheItem>, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<lyx::graphics::CacheItem> > > >::find (this=0x11e8eb70, __x=@0xbffff0d8) at /opt/local/include/gcc42/c++/bits/stl_map.h:541
-#4 0x002857d8 in lyx::graphics::Cache::remove (this=0xb8e248, file=@0xbffff0d8) at GraphicsCache.C:90
-#5 0x00286744 in lyx::graphics::Loader::Impl::resetFile (this=0x11e1f670, file=@0xbffff178) at GraphicsLoader.C:223
-#6 0x00286950 in lyx::graphics::Loader::Impl::~Impl (this=0x11e1f670) at GraphicsLoader.C:204
-#7 0x00706188 in boost::checked_delete<lyx::graphics::Loader::Impl> (x=0x11e1f670) at ../../boost/boost/checked_delete.hpp:34
-#8 0x0014c01c in lyx::graphics::PreviewImage::Impl::~Impl (this=0x140606c0) at PreviewImage.C:121
-#9 0x006b1f80 in boost::checked_delete<lyx::graphics::PreviewImage::Impl> (x=0x140606c0) at ../../boost/boost/checked_delete.hpp:34
-#10 0x006aeea4 in boost::checked_delete<lyx::graphics::PreviewImage> (x=0x11e4d8a0) at ../../boost/boost/checked_delete.hpp:34
-#11 0x005fc478 in boost::detail::sp_counted_base::release (this=0x132a3db0) at ../boost/boost/detail/sp_counted_base_gcc_ppc.hpp:153
-#12 0x006ae044 in std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> >::~pair (this=0x1405efe0) at /opt/local/include/gcc42/c++/bits/stl_pair.h:69
-#13 0x006ae32c in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > > >::destroy_node (this=0x11e60e80, __p=0x1405efd0) at /opt/local/include/gcc42/c++/bits/stl_tree.h:400
-#14 0x006ae388 in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > > >::_M_erase (this=0x11e60e80, __x=0x1405efd0) at /opt/local/include/gcc42/c++/bits/stl_tree.h:1325
-#15 0x006ae3c0 in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<lyx::graphics::PreviewImage> > > >::~_Rb_tree (this=0x65646f75) at /opt/local/include/gcc42/c++/bits/stl_tree.h:592
-#16 0x00141000 in lyx::graphics::PreviewLoader::Impl::~Impl (this=0x11e60e60) at PreviewLoader.C:428
-#17 0x006b03d0 in boost::checked_delete<lyx::graphics::PreviewLoader::Impl> (x=0x11e60e60) at ../../boost/boost/checked_delete.hpp:34
-#18 0x00141560 in lyx::graphics::PreviewLoader::~PreviewLoader (this=0x65646f75) at PreviewLoader.C:286
-#19 0x00680eec in boost::checked_delete<lyx::graphics::PreviewLoader> (x=0x11e618d0) at ../../boost/boost/checked_delete.hpp:34
-#20 0x005fc478 in boost::detail::sp_counted_base::release (this=0x11e5b040) at ../boost/boost/detail/sp_counted_base_gcc_ppc.hpp:153
-#21 0x00680d08 in std::_Rb_tree<lyx::Buffer const*, std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> >, std::_Select1st<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > >, std::less<lyx::Buffer const*>, std::allocator<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > > >::destroy_node (this=0x11e6ebd0, __p=0x11e5e780) at /opt/local/include/gcc42/c++/bits/stl_tree.h:400
-#22 0x00680d64 in std::_Rb_tree<lyx::Buffer const*, std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> >, std::_Select1st<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > >, std::less<lyx::Buffer const*>, std::allocator<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > > >::_M_erase (this=0x11e6ebd0, __x=0x11e5e780) at /opt/local/include/gcc42/c++/bits/stl_tree.h:1325
-#23 0x00680d9c in std::_Rb_tree<lyx::Buffer const*, std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> >, std::_Select1st<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > >, std::less<lyx::Buffer const*>, std::allocator<std::pair<lyx::Buffer const* const, boost::shared_ptr<lyx::graphics::PreviewLoader> > > >::~_Rb_tree (this=0x65646f75) at /opt/local/include/gcc42/c++/bits/stl_tree.h:592
-#24 0x00680dd8 in boost::checked_delete<lyx::graphics::Previews::Impl> (x=0x11e6ebd0) at ../../boost/boost/checked_delete.hpp:34
-#25 0x000c25f4 in lyx::graphics::Previews::~Previews (this=0x65646f75) at Previews.C:58
-#26 0x00002f38 in cxa_atexit_wrapper (routine_param=0xc260c) at ../../gcc-4.2-20060729/gcc/config/darwin-crt3.c:402
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