Compatability issues with NextGEN Gallery

I’ve been using the Yoko theme for several years, as well as the NextGEN Gallery plugin, and it used to work fine together. However, now something in Yoko is throwing off the placement and size of the slideshow images (cutting them in half vertically and overlapping other content), and I’m wondering if Elmastudio is aware of any issues or fixes for this?
I have tracked the issue to Yoko in that I went through and deactivated all of my other plugins one at a time and did not notice any changes. However, when I switched the theme away from Yoko briefly just for testing purposes, the issue cleared up perfectly.
I have 10-15 slideshows with NextGEN on the site, and want to keep the Yoko theme installed. I inquired first with the people at NextGEN, and they offered a few suggestions with CSS, and in the end, said that they thought I should inquire with Yoko developers.

The page I need help with: [log in to see the link]