Peter, please read my posts more carefully!
I was mislead by the WB magic wand and so was using incorrect syntax to extract a file from a CAB file. Using correct syntax reveals there is no bug, as my previous posts have indicated. All I am suggesting is that the magic wand gives more full syntax option so there's less confusion.
A single file can be extracted from the cab file, by giving it's name as third parameter
Magic wand currently only provides this:
Means you have to go and read up help files to actually understand that there is more complete syntax. My suggestion is that why not provide this as currently with CopyOrExpand?
So Expand would become: