Ahh, the joys of trying to solve problems quickly, rather
than methodically.
The problem, as nearly as I can trouble-shoot it now seems to
be not that the slides aren't publishing, but more likely that the
entire presentation doesn't load all at once. I was going nuts
because that occurred on one presentation when my boss reviewed the
whole set, but then each one I subsequently published, if I
fast-forwarded toward the end of it, somewhere along the way, I'd
get the blank slides. I believe I was moving ahead of what had
loaded. I suspect then that the machine froze or something when my
boss looked at the one presentation (figures, doesn't it?), thereby
causing me to look for it to happen again as expediently as
possible, which caused me to find it.
Once I backed away from the blank area, if I re-approached it
slide by slide as was intended, the mysterious disappearing slides
reappeared.