users will now see the notifications as soon as they unlock an achievement
If you’ve customised the notifications template from previous versions of Achievements, don’t worry. Achievements will detect that and switch back to the old-style notifications until you’re ready to update your template.
"With BuddyPress your users get loads of emails for all the notifications they receive. Creating a good looking email template does wonders for the feel of your network, and really gives it a more unique feel."
Hyper Cache is specifically written for people who have their sites on low resource hosting providers. This plugin will make an enormous speed improvement and is recommended instead of other similar plugins such as WP Super Cache or W3 Total Cache. It will work better with BuddyPress and is quite simple to set up.
The problem was with the DB Cache Reloaded plugin. Not only would the notifications not go away but when individuals submitted anything on a wall or activity stream, this would not be published for several minutes. When I removed the DB Cache Reloaded plugin, the problem went away!
However, every additional plugin you install will need to request information from your database and the cumulative effect of having dozens of plugins is that your site will slow down. Use only the plugins that you actually need. Try to remove the rest.
There are 12 shortcodes available in order
to display a specific member, a group, a list of members, the friends of the displayed or loggedin user, the groups of the displayed or loggedin user,
the messages and the notifications of a loggedin user, blogs of the network, posts from the blogs of the network.