{F159580}I made a small game (press P) to ensure the best match and the bad one of the input result of "buttons" and "hat" of the xbox controller. Until blender 2.72a is perfect and unfortunately in 2.73 and 2.74 do not. I tried this on Vista 32-bit and gives the same defect.

in blender 2.73-b4fccce-win64 the problem is not solved (this is the version to which you referred?)

Exact steps for others to reproduce error:
Open .blend file,press P, in game mode if you use button and hat of Xbox joystyck in blender 2.72 the empty (and cube associate) move well.
But if you use blender 2.73 or 2.74 testbuild the joystick sensors button and hat is not working properly.

version 2.73 (sub 9), branch b'master', commit date b'2015-03-03' b'13:48', hash b'ed5df50', b'Release'
build date: b'2015-03-03', b'15:58:44'
platform: b'Windows:32bit'
binary path: 'C:\\Program Files\\Blender Foundation\\test 2.73\\blender-app.exe'
build cflags: b'-DWITH_FREESTYLE /nologo /J /W3 /Gd /w34062 /wd4018 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /we4013 /we4431 /D_WIN32_WINNT=0x600 /DOIIO_STATIC_BUILD /openmp -O2 /Ob2 -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE -DOPJ_STATIC -DWIN64 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL'
build cxxflags: b'/nologo /J /W3 /Gd /w34062 /wd4018 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /we4013 /we4431 /D_WIN32_WINNT=0x600 /DOIIO_STATIC_BUILD /openmp /EHsc -O2 /Ob2 -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE -DOPJ_STATIC -DWIN64 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL'
build linkflags: b'/SUBSYSTEM:CONSOLE /MACHINE:X64 /STACK:2097152 /OPT:NOREF /INCREMENTAL:NO /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcmrt.lib /NODEFAULTLIB:msvcurt.lib /NODEFAULTLIB:msvcrtd.lib'
build system: b'SCons'