If that's the case, I may have already fixed this. Send your email address to xbytor@gmail.com...
Got it. Will take a look at this later today or over the weekend. -X
I just uploaded a fix for the caption/thumbnail gap tweak you requested. Details...
Here's an answer: On the Layout panel, make sure that Use Auto-Spacing is selected....
I haven't looked at this code in a few years, but I may be able to provide a setting...