Ok, we see what you mean now. Your logo size is too big for browsers like Chrome and Safari and that's why it's quality is poor. For example Chrome, display logo 120x85px while the original size of the logo is 275x195px. We recommend to upload smaller logo, for example 130 or 140px width.
Comments
could you explain if you noticed this issue in specific browser? Because we checked your site already and didn't found anything wrong with the logo.