'add to home screen' button missing from share
I am trying to save a web page shortcut to the home screen so it appears as an app tile.
I did it ten minutes ago and the 'add to home screen' button was there in the share menu.
But now it is not there.
It is normally next to 'add to reading list' Look at the screen grab below to see it is not there.
It is now gone. How do I get it back?
What could i have done to make this button go away?
MacBook Pro (15-inch Mid 2010), OS X Mountain Lion (10.8.2)