Here's some more content to look at for those working towards a fix: I ran "unity --debug" and got this:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff3b5c700 (LWP 10817)]

Program received signal SIGHUP, Hangup.
0x00007ffff7331c07 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
#0  0x00007ffff7331c07 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fffeabab74c in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#2  0x00007fffeabb014f in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#3  0x00007fffea82e651 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#4  0x00007fffea79acd2 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#5  0x00007fffea79ade4 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#6  0x00007fffea79be0b in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#7  0x00007fffea806fe5 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#8  0x00007fffea79561a in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.304.37
No symbol table info available.
#9  0x00007fffebb3a44c in ?? () from /usr/lib/nvidia-current/libGL.so.1
No symbol table info available.
#10 0x00007fffebb246eb in ?? () from /usr/lib/nvidia-current/libGL.so.1
No symbol table info available.
#11 0x00007ffff7de992d in ?? () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#12 0x00007ffff72828e1 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#13 0x00007ffff7282965 in exit () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#14 0x00007ffff6d35363 in _XDefaultIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#15 0x00007ffff6d3559e in _XIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#16 0x00007ffff6d3357c in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#17 0x00007fffebb4bcaa in ?? () from /usr/lib/nvidia-current/libGL.so.1
No symbol table info available.
#18 0x00007fffebb19342 in ?? () from /usr/lib/nvidia-current/libGL.so.1
No symbol table info available.
#19 0x00007fffebb0fac4 in glXBindTexImageEXT () from /usr/lib/nvidia-current/libGL.so.1
No symbol table info available.
#20 0x00007fffebdec212 in TfpTexture::bindPixmapToTexture(unsigned long, int, int, int) () from /usr/lib/compiz/libopengl.so
No symbol table info available.
#21 0x00007fffebde71a4 in boost::detail::function::function_invoker4<GLTexture::List (*)(unsigned long, int, int, int), GLTexture::List, unsigned long, int, int, int>::invoke(boost::detail::function::function_buffer&, unsigned long, int, int, int) () from /usr/lib/compiz/libopengl.so
No symbol table info available.
#22 0x00007fffebdebe24 in GLTexture::bindPixmapToTexture(unsigned long, int, int, int) () from /usr/lib/compiz/libopengl.so
No symbol table info available.
#23 0x00007fffe786eaa5 in WallScreen::setupCairoContext(_WallCairoContext&) () from /usr/lib/compiz/libwall.so
No symbol table info available.
#24 0x00007fffe786f74b in WallScreen::drawSwitcherBackground() () from /usr/lib/compiz/libwall.so
No symbol table info available.
#25 0x00007fffe78716ad in WallScreen::createCairoContexts(bool) () from /usr/lib/compiz/libwall.so
No symbol table info available.
#26 0x00007fffe7872881 in WallScreen::WallScreen(CompScreen*) () from /usr/lib/compiz/libwall.so
No symbol table info available.
#27 0x00007fffe787a6b8 in PluginClassHandler<WallScreen, CompScreen, 0>::get(CompScreen*) () from /usr/lib/compiz/libwall.so
No symbol table info available.
#28 0x00007fffe787a89c in CompPlugin::VTableForScreenAndWindow<WallScreen, WallWindow>::initScreen(CompScreen*) () from /usr/lib/compiz/libwall.so
No symbol table info available.
#29 0x00007ffff7b89bd6 in CompManager::initPlugin(CompPlugin*) () from /usr/lib/libcompiz_core.so.ABI-20120526
No symbol table info available.
#30 0x00007ffff7b8a4a1 in CompPlugin::push(CompPlugin*) () from /usr/lib/libcompiz_core.so.ABI-20120526
No symbol table info available.
#31 0x00007ffff7b610b8 in compiz::private_screen::PluginManager::updatePlugins(CompScreen*, std::vector<CompOption::Value, std::allocator<CompOption::Value> > const&) () from /usr/lib/libcompiz_core.so.ABI-20120526
No symbol table info available.
#32 0x00007ffff7b62522 in PrivateScreen::processEvents() () from /usr/lib/libcompiz_core.so.ABI-20120526
No symbol table info available.
#33 0x00007ffff7b90d87 in CompEventSource::callback() () from /usr/lib/libcompiz_core.so.ABI-20120526
No symbol table info available.
#34 0x00007ffff608aacf in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
No symbol table info available.
#35 0x00007ffff5b8fdb5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#36 0x00007ffff5b900e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#37 0x00007ffff5b904e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#38 0x0000000000402543 in main ()
No symbol table info available.