I have reinstalled 1.8.1,
here is the link where you can see the misalignment problem occurring. What I've noticed is that the problem occurs only if you drag the pictures using the mouse, not if you use the mouse's scroll wheel. So, it's something related to the drag function.
But I have to give more details about the album. First, it's using FooGallery, but secondly, and I suspect this is an important aspect, these are not your regular pictures Fancy Lightbox is displaying, but 24 bit, uncompressed PNG files, each 8 Mb in size, taken directly from Google Drive ! Foo Gallery uses the custom links I have made for each picture to serve them to Fancy Lightbox directly from Google Drive, so, in essence, all that is shown from my web hosting service are just the thumbnails, but the full sized images are taken directly from Google Drive.
PS: and by the way, wish you guys (Foo Gallery / Ari) would try to implement this in your software, to automatically generate Google Drive links, because right now, if you want to display images hosted from Google Drive, you have to manually modify all the links, which is kind of a pain in the butt. Check out
this article about making Google Drive links. Why this matters ? Well, just take a look at the speed, how seamlessly they load, just like if they were some small compressed JPG files, when in fact, these are huge files. And I have even tested this strategy using 4K uncompressed PNG files, each 30 Mb in size, and still Google Drive did a nice job ! Just imagine what kind of web hosting service you would have to get to be able to serve files this big, this fast. Probably in the dedicated server range.