I'm also having a problem that might be related to the problem as discussed in this post.
I used wsusoffline 84 to create the iso image to install the updates onto a windows 7 SP1 x86 system.
The process bombs out at the end of all the checks that happen to see what needs to be installed.
The message that I get reads "File hash does not match stored value" and it then refers to "wsusscn2.cab"
I used Roxio to burn the wsusoffline-w61.iso to a DVD.
A coworker tested the same DVD image and gets the same hash does not match message. Could I possibly have done something wrong?