this looks to me as CSS issue, try to diagnose this problem using chrome developer tools
SharePoint uses image maps for his sprites. If you have a display like this you have an issue with your css files.
- Check if you have any access denied or file not found issues for the css files (Use Fiddler or F12 Developer dashboard).
- Check that they have a mayor version published.
- Clear browser cache and reload the page (ctrl+F5)