Comment 5 for bug 645859

The key element of the retrace:

Thread 1 (process 24540):
#0 g_type_check_instance_cast (type_instance=0x656361, iface_type=11621536)
    at /build/buildd/glib2.0-2.25.15/gobject/gtype.c:3969
No locals.
#1 0x00000000004214d1 in trackerVisibleFunc (model=0x12b2d10,
    iter=0x7fffdb8d0760, data=0x10d4000) at details.c:1911
 isBackup = 32622
#2 0x00007f6e061b59cc in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#3 0x00007f6e061b7a14 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.