They've finally started showing up. I'd already tried "Library - update library from tags", but at the time it didn't seem to do anything. What's even stranger is that if I switch from Audio to Video, I have several files displaying red "x"'s (indicating the file isn't available. Strangely enough, many of those are displaying images (which normally wouldn't be strange, as they're video files, but if the files weren't there they shouldn't display anything), but still have red "X"'s. If I double-click them, they play just fine.
Just had me worried for a while. I understand it taking some time to perhaps refresh the display due to a newer version, but after 5-10 minutes of no images, I was starting to get worried. I don't have one of these huge collections, but the thought of re-adding images to over 8000 files wasn't something I was looking forward to.
Now if I could just get the videos to figure out that they're actually there (most are fine, it's just 18 out of 655 videos that think they're not there, even though they're displaying images)...
Thanks for the prompt replies, guys, excellent service as always. Guess I'll bump it to the latest version and see if anything else falls out