Bug#659444: gnome-shell random crashed when click the activity area

[toplinuxsir]

gnome-shell random crashed when click the activity area

the error message is:
gnome-shell: segfault at 3956b1008 ip 00007f9d3d675618 sp 00007ffff510a550
error 4 in libglib-2.0.so.0.3000

somtimes is: gnome-shell : segfault  in libcogl.so

My computer:

    graphic card: HD6670

     driver : use the amd official version : 12.1

     OS: debian wheezy (up to date)
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