Please note that we have released a new build of Acronis True Image 9.1 Workstation, which includes fix for this issue. The latest build (3832) of Acronis True Image 9.1 Workstation can be downloaded from "Product Update" section of your account. To get access to updates you should first register your software.
Also a new build (3832) of Acronis True Image 9.1 Enterprise Server, which includes fix for the same issue with false message about corruption of any file backup (back up of a separate files/folders) is available for download.
Please also be aware that you should also update all components including Acronis Agents, Acronis Management Console, Acronis Backup and Group Servers, Acronis Universal Restore as it is obligatory for all components to be of the same build in order to interact correctly. Also it is recommended to create new Bootable Rescue CD after installing the update.
Thank you.
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Aleksandr Isakov
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Acronis, Inc.
52 3rd Avenue
Burlington, MA 01803 USA http://www.acronis.com