Not that there was ever any error message to this effect. When I first noticed that the suitcases weren't installed, I assumed I'd somehow missed them when I was transferring stuff. Then I tried again, and nothing happened. Finally, I tried just copying one of them to the G5's desktop. The file showed up on the desktop for a second, then vanished. WTF? At the very least, Windows pops up a useless message when something like that happens.
I checked to make sure the file wasn't in use on the laptop, and I restarted both computers. Still no dice. I finally wound up burning the missing suitcases on a cd, and transferring them that way. That worked.
I hate computers.