The problem is caused by using certain versions of the WooFramework or certain WooThemes theme versions (I’ve seen this quite a bit with the Canvas theme). Here is how to apply updates and restore the shortcode icon in the Page and Post editor.
- Go to Canvas -> Framework Settings.
- Place a check in Theme Update Notification.
- Place a check in WooFramework Update Notification.
- Click Save All Changes.
- Go to any URL on the Site (this will force a check if there is an update).
- Go to Canvas -> Update Framework and apply any update.