You can now choose your own maximum image viewing dimensions by selecting the corresponding forum style from the drop-down menu in the far bottom left corner of any forum page. If you choose one of the default/standards styles, then any image posted at greater than 1024px size will automatically be resized to 1024px for your viewing. This has been the case for some time now. However, now there are two other options. The options marked "for H-Res displays" will only resize images for viewing if they are larger than 2048px, whereas those designated "for smaller displays" will display images only to a maximum dimension of 512px. The idea is for everyone to be able to view images as high-res as possible without having to do horizontal scrolling to read forum posts. I'm planning to embed my Flickr photos at the 1600px size going forward. Hope you enjoy this change!