Comment 1 for bug 256053

I see the same thing. But I first noted it when wireshark crashed everytime I quit.
My backtrace is fairly similar:
/lib/tls/i686/cmov/libc.so.6[0xb5c97a85]
/lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb5c9b4f0]
/usr/lib/libglib-2.0.so.0(g_free+0x31)[0xb5f98c61]
/usr/lib/wireshark/libwireshark.so.0[0xb700e7f4]
/usr/lib/wireshark/libwireshark.so.0[0xb69b0f59]
/usr/lib/libglib-2.0.so.0(g_slist_foreach+0x21)[0xb5faee81]
/usr/lib/wireshark/libwireshark.so.0(init_dissection+0x41)[0xb69b38b1]
/usr/lib/wireshark/libwireshark.so.0(cleanup_dissection+0x17)[0xb69b38e7]
wireshark(cf_close+0x31)[0x80766f1]
wireshark(main_do_quit+0x104)[0x80891a4]