Description of problem:
Closing the VM window from virt-manager, then reopening it, thusly, reconnecting the graphical display to the VM. 

Version-Release number of selected component:
qemu-system-x86-1.2.0-24.fc18

Additional info:
backtrace_rating: 4
cmdline:        /usr/bin/qemu-kvm -name Fedora18 -S -M pc-1.2 -enable-kvm -m 2048 -smp 1,sockets=1,cores=1,threads=1 -uuid 7f903132-e3d5-370c-7421-bcb363f9c88e -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Fedora18.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/home/william/VirtualMachines/Fedora18.img,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:f4:95:fa,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing -vga qxl -global qxl-vga.vram_size=67108864 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7
crash_function: spice_logv
executable:     /usr/bin/qemu-kvm
kernel:         3.6.10-4.fc18.x86_64
remote_result:  NOTFOUND
uid:            107
xsession_errors: 

Truncated backtrace:
Thread no. 1 (10 frames)
 #2 spice_logv at log.c:109
 #3 spice_log at log.c:123
 #4 lz_usr_error at red_worker.c:5467
 #5 lz_encode at lz.c:524
 #6 red_lz_compress_image at red_worker.c:6038
 #7 red_marshall_image at red_worker.c:8600
 #8 display_channel_send_item at red_worker.c:8911
 #9 red_channel_client_send_item at red_channel.c:507
 #10 red_channel_client_push at red_channel.c:1088
 #12 red_push_surface_image at red_worker.c:5095