The error is not only because of changing the name of folder, as vishal says md5 mismatch can occur.
I even encountered the following problem with nandroid backup.
stock gb,xxkpu nandroid not compatible over cm9 or miui.
Or miui/CNET not compatible over stock rooted ROM.
I'm not sure of the reason why this error occurs while reporting the nandroid backup, but according to my limited knowledge of Android, I suppose either ext4 partition is not compatible over rfs of stock and vice versa or, out might be a kernel clash.
To be true, I didn't even try to search much about the issue as I'm mostly free and take the pain of customizing three new firmware as power my preference and reinstalling the app
Sent from my GT-I9003 using xda premium
Device : HTC Sensation z710e
ROM : ViperS 1.2.1
Sense: v 4.1
Recovery : 4EXT Touch Recovery
Firmware : 3.33.401.6
H-BOOT : 1.27.1111
Radio : 11.24A.3504.31_M
Kernel : 3.0.36-Bricked-3.0-v 1.36
Battery: Stock HTC Sensation
Unlocked Bootloader & S-off by JuopunutBear