I have a problem with both mGalaxy 5.5 and 6.0 versions. Everything is going well but I have a couple of problem with basic settings such as the trackball (it is well recognize by mame but not when mame is launched by mgalaxy) or the screen resolution (again, from mame itself, everything is good but from mgalaxy; i have a "blur" filter like a pixel stretching)
I'll try to find the solution anyway and I'll update it
Thanks for you help