Like the new "Back to ..." Mail or whatever that appears in the upper left when you link/open from say and email to a webpage. But .... I'll be in an email, click the link in said email (let's use a notice from this site in an email), link opens in Safari and I get this cute little <Back to Mail in the upper left of Safari. If clicked it quickly takes me right back to my mail. However .... If I just close the Safari Tab and go to another app or task or even back to email via Task Manager, the <Back to Mail stays in Safari. Even if I close the tab, delete the email .... The only way to get rid of it is to kill your email in Task Manager or click it in Safari. Which takes you back to your email app. not serious, but annoying and show lack of attention to detail. This has been true now for all 9.x releases.