For a good while the image galleries have worked what I consider properly--when you were on thumbnail page XX and clicked on a photo, then hit your backspace key, you were back on page XX again.  Today I am being turned to thumbnail page 1, which annoys me when I am looking for a photo in the area of page XX and have to hop, skip and jump back to page XX (which in some forums may be page 34 or 53 or something).  Is it something in the forum software?

(As a work-around I'm now opening individual images in a new tab.)