I installed Node Gallery in a D7 website, configured the module, and uploaded some images. The default view of the gallery thumbnails is great when using a core theme - the thumbs are nicely spaced, getting closer together as you add up to 4 images per line.

I then switched to the Jackson theme. Now, the thumb images are all smashed together. I have tried using firebug to compare the CSS between the two themes and apply tweaks to no avail.

Can you please help me get this sorted out? Thank You.