When saving a change to the maintenance plan the SQL Agent job owner changes back to the original owner of the job. We found out that the job reverts back after we tried to set the job up to run under a proxy account and then made a change to the maintenance plan.
I have posted this question here: Maintenance plans and proxy accounts http://www.sqlservercentral.com/Forums/Topic842203-146-1.aspx?Update=1
And I have followed the recommendation here: The Job whose owner kept coming back...... http://sqlblogcasts.com/blogs/acalvett/archive/2007/12/30/the-job-whose-owner-kept-coming-back.aspx
Besides manually resetting the owner of the job back, I can't get the new job owner to stay. This is a 32-bit SQL 2005 Developer Box on SP3 (build: 9.0.4035).
Additionally: MyDomain\DevSQL is not a login under SSMS, Security, Logins on my server