Question : Database stays in single user mode after backup

My Sharepoint Intranet database is hosted on one of our SQL 2000 servers; we use NetBackup 5.1 MP6 to perform the backups of all our systems and occasionally, our Sharepoint Intranet database gets "stuck" in Single User mode after backup. The cleanup of this is going to the Options tab of the database properties and unchecking Restrict Access but that doesn't remove the issue in the long run. This doesn't happen often, perhaps once a month, but there has been no discernable pattern to the problem so I don't know why its happening.
Anybody else ever seen anything like this?

Answer : Database stays in single user mode after backup

It will help if you can find that.
You can schedule this SQL command to run after backup is done:

ALTER DATABASE DatabaseName SET MULTI_USER