This issue started since upgrade to Oxwall 1.8. When you view the first tab (any tab, for example latest), everything is displayed correctly. But when you switch to the next tab (for example, to top rated) the first 20 pics are displays correctly, but after that it displays pics from the tab that you previously viewed. If you refresh the page, the problem goes away and pics are displayed correctly. If after that you again switch tab (for example, to top discussed), once again, first 20 pics are correct, the next are from the previous tab, until you refresh the page. And so on...
In other words, it is some very weird cache problem. It is the same in Google Chrome and Firefox, so it is not browser-related.
I've cleaned cache, but it doesn't help. The problem persists. And just in case, I DO NOT have OxArt Speed Optimizer plugin running. And I have the photo plugin version 9950 (latest).