Comment 2 for bug 802445

Looks like a crash within libclutter, called from the ClutterFlow extension. To workaround this you can uninstall the banshee-extension-clutterflow package. But before that, could you try installing the libclutter-1.0-0-dbgsym package by following the instructions from https://wiki.ubuntu.com/DebuggingProgramCrash#Debug_Symbol_Packages, run "sudo sysctl kernel/yama/ptrace_scope=0", and then get another crash log, please?