http://www.vbulletin.com/docs/html/m...group_usernote
Users with permission to read / write usernotes are now able to goto a profile of a member and leave usernotes about this person. This feature is intended to allow staff members to discuss members and keep the information organised rather then having a variety of threads in a staff forum.
The vBulletin Options > vBulletin Options > User Notes Options setting group allows you to set up the parsing for a usernote. You can turn on or off the use of BB Code, Smilies, [IMG] tags and usage of HTML.
Note:
The ability to use usernotes, read them, read your own, allow others to reply or manage them is a usergroup setting. Do not forget to walk through each usergroup to set the use and permissions of usernotes correctly.