From reading through Terabyte Unlimited's manual for Image for Windows a few things stand out:
Warning to Windows 8 Users
You must disable the Windows 8 Fast startup option or you risk corruption of your partitions and data when the partitions are used outside of Windows 8 (e.g. you boot into Image for Linux after shutdown and save an image to a data drive).
Disable TRIM – Reduces the amount of caching required for the source drive on systems with TRIM enabled by disabling TRIM during the backup operation. When TRIM is enabled the original contents of deleted sectors must be cached, whereas a normal delete doesn’t overwrite the sectors and instead just updates the directory entry.
Backup Unused Sectors – By default, if the file system(s) you are backing up are one of the recognized types (i.e. FAT, FAT32, NTFS, Ext2/3/4, ReiserFS, or HSF+), Image for Windows will back up only used sectors. If you select this option, Image for Windows will include all used and unused sectors in the backup. This option has no effect on partitions that do not contain a recognized file system; such partitions will always be backed up in full, regardless of this setting.
I don't know whether any of this applies to you, but it's worth checking out. There is also an extensive list of switches that can be used which start somewhere about page 130 in the manual. A couple that seem interesting to me are:
/comp:n {0,1,2,7,10,11,12,13,14,15} - compression
/mf - Multiple File Set mode (separate file for each partition)
/nt - Disable TRIM