Thanks again, your suggestion to switch to normal size fonts fixed this issue. I previously had the display setting on large size (120 DPI). There isn't really that much of a difference between the font sizes anyway, so I can stick to the normal font size for now.
I'll be happy to privately test the version 1.4.0 release and let you know how that handles everything. I installed the previous version of Videophile as well and found that the preview area looked fine even with the large font size setting in place. The cataloguing section still looked a bit squashed though.
Incidentally I think I might have screwed something up amidst that unistalling and reinstalling. Version 1.3.0 now has these bizarre black numbers on top of each thumbnail. Each thumbnail clicked on keeps switching between a 1 and 3 figure or 0 and 2 on top of the thumbnail. Clicking on any of those empty boxes around the thumbnail also brings up a number 5 which then disappears if the window is resized.
EDIT: The color of the numbers change to whatever the cursor colour setting is set to.
Here's a screenshot:
