Crap. I backed up my user folder to a .sit file so that I could keep everything together when I copied it to another hard drive on a Windows laptop I'm networked with.
Of course, to my greatest regret, the file won't expand again. With the Mac Stuffit expander, I just get Error #17537 and it halts after it expands a few files. On the Windows Stuffit standard suite in demo mode, the software just exits without an error message or anything while trying to expand.
Anybody know of a .sit recovery utitlity? Aladdin's own software can't fix it so I'm doubtful-but just in case...