Hey guys!
-- Disregard the stuff below. It's been fixed. Make sure to visit your Notification options and tick the option to notify you when someone mentions you in a post. --
Some of you may have noticed that the @Mentions doesn't really send out a notification to the mentioned user. This happens because Content Feed & @Mentions both use the same Library Hook 'classPostForms'.
If I fix @Mentions, Content Feed won't update. If I leave Content Feed, @Mentions won't notify the user.
I have found a way around this though. You can mention the user and send him a notification by posting your topic/post and after it's posted & Content Feed registers it, edit your post/topic and add a user you want to mention. That's the way the user can get notified.