What steps will reproduce the problem?
1. Scroll Down to Galleria slideshow in middle of page: fdp.scdny.com
2. Active image appears briefly, then disappears
3. Select an image
4. Scroll back to top, then back down to Galleria slideshow
5. Image is no longer selected

What is the expected output? What do you see instead?
My Galleria slideshow is in the center of a long page that uses the Smoothscroll script to move up and down between individual "pages". In every other example of Galleria I've seen, the module is always at the top of the page, or the only item on a page, so there is no page scrolling involved. When you scroll down to my slideshow in Firefox or Safari, the active first image appears briefly, then is no longer selected. The slideshow itself works perfectly once a thumbnail is clicked. But when you leave the slideshow for another section, then return to the slideshow, the active image is no longer selected.

What version of the product are you using? On what operating system?
I have the latest versions of jQuery and Galleria. This behavior affects Firefox and Safari in Mac OS X, but not Internet Explorer (6, 7 and 8) in Windows XP where the active image stays selected. It also works fine with Safari on the iPhone.