Thanks for reply.That looks like the "Logo" not the home button. Go to "Customization / Header" and re upload it.
The problem occured before i update the theme, and aft lastest update. It still occur.Been long time i never update the menu but just upload new products, i am sure its not setting problem but the theme itself. It is davinci theme.That's not an image ..it's a glypicon. Does your theme need updating? Have you recently updated your theme? Need more info ...What theme is it? Have you been editing the header.php file?