One of the biggest problems that occur with SocialEngine is due to the fact that the file permissions are correct always make sure you check your permissions every few weeks. You can do this via your admin panel:
Also if you rather use an FTP Client to set permissions,
This will run a check on whole SE Install.
If you are using a Unix server (or Unix variant, like Linux, OS X, FreeBSD, etc.),
777 permissions must be applied to the following directories:
To apply permissions to these directories manually login over FTP and recursively set the permissions of the directories listed above to 777.
With keeping the correct permissions throughout the running of your SE Network will help keep problems down.