SQL Agent Job Failures

The job failed. The owner () of job import jobs | jobname does not have server access.

The message here is deceptive, and sent me down the route of checking permissions.
I knew I hadn't changed any permissions but I had to verify that a colleague hadn't either.
The job was owned at the time by a Windows account (I've since changed this).

There was an annoyingly simple solution to this problem.
Restart SQL Server Agent!

Basically, for reasons unknown (possibly the SQL VM being paused rater than restarted), the network service account that jobs were running under could no longer be verified by the SQL 2005 instance (lost contact with domain controller on restart or similar).

Date 11/05/2009 09:32:46
Log Job History (import jobs | jobname)

Step ID 0
Server SQL05-UAT
Job Name import jobs | jobname
Step Name (Job outcome)
Duration 00:00:00
Sql Severity 0
Sql Message ID 0
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0

Message
The job failed. The owner () of job import jobs | jobname does not have server access.

Link
http://social.msdn.microsoft.com/forums/en-US/sqltools/thread/47e7bc08-efa6-4a80-b8cd-1df92f10e7bc/