This is not a real bug. But it could be somehow annoying for some people (not me, really). Help texts for each tool show a message like "Right button bla bla bla, Left button blu blu blu. Some people have changed their mouse settings to invert their buttons, as they are left handed. They might be a bit confused with this help text. Could we display "main button' and "secondary button" instead? Or we might use some registry keys to determine if the user has inverted his/her mouse and display the appropriate message...