Drive: segmentation fault on Qt exit under Ubuntu

2013-10-13 02:12:56,418 7709 140736750155520 INFO     nxdrive.synchronizer Stopping synchronization (pid=7709)
[Thread 0x7fffd3fff700 (LWP 7720) exited]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff2ac37c8 in QObject::thread() const () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
(gdb) 
(gdb) 
(gdb) bt
#0  0x00007ffff2ac37c8 in QObject::thread() const () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#1  0x00007ffff3d452cd in ?? () from /usr/lib/python2.7/dist-packages/PyQt4/QtGui.so
#2  0x00007fffef746fb4 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#3  0x00007fffef7477d9 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#4  0x000000000045d488 in subtype_dealloc ()
#5  0x000000000054878d in dict_dealloc.18156 ()
#6  0x00007fffef746d57 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#7  0x00007fffef747742 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#8  0x00007fffef7477e1 in ?? () from /usr/lib/python2.7/dist-packages/sip.so
#9  0x000000000045d488 in subtype_dealloc ()
#10 0x000000000054878d in dict_dealloc.18156 ()
#11 0x000000000045d198 in subtype_dealloc ()
#12 0x000000000054899a in PyDict_Clear ()
#13 0x0000000000548a89 in dict_tp_clear.18299 ()
#14 0x000000000054e286 in collect.48496 ()
#15 0x000000000047ec3d in Py_Finalize ()
#16 0x000000000047f148 in Py_Exit ()
#17 0x000000000047f27c in handle_system_exit.42667 ()
#18 0x0000000000424a8c in PyRun_SimpleFileExFlags ()
#19 0x0000000000425cb6 in Py_Main ()
#20 0x00007ffff68cc76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#21 0x000000000041bb31 in _start ()