I love the captionator.
However... there's a tiny UI flaw, in my opinion.
The thumbnail is next to the caption box, which means that as you're editing the caption, you can't see much of the thumbnail without scrolling around.
If the thumbnail was above the caption box, hitting 'tab' to get to the next field would also scroll the thumbnail completely onto the screen.
Bad ASCII "art" to show what I mean.
+-----+ [comment field]
|xxxx | <- bottom of screen after a few comments
|xxxx |
+-----+
vs
+-----+
|xxxx |
|xxxx |
+-----+
[comment field]
<- bottom of screen after a few comments
Tackett