Here's a little tip if you are thinking to upgrade to ITMS 7.5 SP1.
During the upgrade of deployment, I discovered that the installation deletes deployment folder, and then makes a new one. So if you have your unattended xml files in this folder, make sure that you make a backup of them. When the upgrade is complete, you will see that your image jobs ar corrupted. because xml files are missing. You now need to copy your XML files into the deployment folder again. But image jops ar still not working.
I contacted symantec support and they gave me this sql query,
SET [State] = cast([State] as nvarchar(max)) + '</vItem>'
WHERE [State] like '<vItem>%' and [State] not like '%</vItem>' and LEN(cast([State] as nvarchar(max))) < 4000
Run this after you copy youre xml files to the deployment folder. and youre image jobs will now work again.
it is a good idea to open your image task and save them again, as it will get sql database to save a new version of the image task.
I hope this will help someone