I would say by all means, post them. Please describe the prior experience of your students, though. I noticed that the HS teacher at IPC8 said that case-sensitivity was *not* a problem, and that his students were Linux users. Randy Pausch said it was a serious problem, but I think it's a safe guess most of his students had only Windows experience. So if your students were mostly Fortran programmers, that should help keep their needs in perspective, (it took me at least 2 years to recover from the trauma of coding Fortran on punch cards).
I don't know if it's a Windows/Unix thing; however, I do think that anyone (of any age) who's using Linux has long since been assimilated into the case-sensitive world... Luckily, it didn't come up in the feedback... :-)