I tried out 1.3 today but found that when I enabled "Rename Start Screen to Apps..." that new mail notifications for Outlook 2013 ("toast" that pops up on the upper-right portion of the screen), along with the accompanying notification sound, stopped happening. Rebooting doesn't help. Disabling the Start Screen feature allowed Outlook's notifications to work again.
May be a bit off topic, if so I apologise, but if a SIB setting does affect those awful "ModernUI" notifications, it would be handy to have a setting that would disable them and revert software to using the traditional tooltip balloons.
As an example, I have the same version of Malwarebytes running on win 7 and Win 8. On Win 7, it uses the traditional balloons for user notifications, but on Win 8 it uses the Modern UI with no way to revert. I find that I don't always see the new style notifications because they appear at the top of the screen which is not in ready view of oldies like me who have to use progressive lenses for computer work. I don't notice stuff at the top of the screen unless I make a conscious effort to look up there!