my reputation has gone down!

We don't really know exactly how our precious stars go up and down, but it's hard not to be affected by its rising or waning. Most probably some members rated you negatively for some reason. I believe that we should rate a post negative if it is offending or not helpful, but not because it contradicts our own opinions. If like what you said they are quality responses and not offensive, don't worry, I believe mylot checks the negative ratings and does something about it if someone deliberately rates a member negatively just to make their stars go down. So cheer up!