The notification area will let you know if you need to synch any of your data with the main repository. For example, the image below is saying that you need to synch your member data due to changes you have made.
In order to synch your data, you can choose the appropriate action from the Repository menu. Alternatively, you can go to the repository menu and choose Check for Updates.
Please note: your events will not be checked against the repository - you must publish these manually from the events screen.