...an apparently undocumented SmugMug feature has saved me lots of repetitive work.
A year ago I posted 100+ shots from my college reunion on SmugMug for the amusement of attendees. Part of the process was identifying everyone in captions, which took many emails over a couple of weeks.
That was a year ago and it's time to pull those galleries down, but I didn't want to lose all the names attached to the faces. So I figured I'd open a Word document, then cut/paste 100+ captions into it and save it with the pictures in my archives.
Funny thing happened: I was a little careless with my mouse in selecting a caption and I found I had all of them on that page. Awright! 
It turns out I could select the thumbnails at the left of the page with my mouse, copy them to the clipboard (CTRL-C), then paste them into the Word document (CTRL-V). But this didn't save the thumbnails, it saved the captions. Exactly what I wanted.
EDIT: I used WordPad, not Word. See post #4 below.
Here's what I selected:
Not something you'd use frequently, but good to know.
-js


