Hello,
here are results from log. Only UP/DOWN keys were pressed (randomly forwarded key bellow and cursor skipped to command line bar):
2014-02-22 16:32:26.729 Forwarding key : 0xff , Rep 1 , Flags : 0x4159
2014-02-22 16:32:34.239 Forwarding key : 0xff , Rep 1 , Flags : 0x4159
2014-02-22 16:32:41.256 Forwarding key : 0xff , Rep 1 , Flags : 0x4159