1) The bug reproduced with several PC with 64 bits kernel (different keyboards used)
2) The bug exists in kernels
Linux cd 3.8.0-030800rc4-generic #201301172335 SMP Fri Jan 18 04:45:42 UTC 2013 i686 i686 i686 GNU/Linux
and 3.9 version
but it happens much rarely with latest kernels.
I want to add some details.
1) The bug reproduced with several PC with 64 bits kernel (different keyboards used)
2) The bug exists in kernels -generic #201301172335 SMP Fri Jan 18 04:45:42 UTC 2013 i686 i686 i686 GNU/Linux
Linux cd 3.8.0-030800rc4
and 3.9 version
but it happens much rarely with latest kernels.