This was originally raised by Ousenko on the 6th Jan 2010. I added a note that I was having the same problem on the 22nd June 2010 but have not received a reply. Therefore I am raising it as a new question.
Ousenko's original problem "....
After recording all data on the device in the "device notes", they are saved.
But after a page refresh (update status, etc) all data in this section is missing."
I too have this problem which started when I migrated my OpManager 8052 from Windows 2003 to Windows 2008 server. The restore of the database backup cleared all the Device Notes and I am not able to create new ones in the same way described by Ousenko.
Do we have a solution for this?