I am using windows. But as you see it had been updated in June, and the older versions are no longer downloadable. I e-mailed the developer when i posted this message and got no reply. I will go through my hard drives and find an older version to test it out... But still, i have been using it since i posted this message. And it has the bug. Things are going strange nowadays, this might be a parallel universe and maybe japan princess is right about the 5th dimension and we all should be carefull about soda cans... Selection tools are not working in Maya UI anymore, in this universe.