As requested there is now an image resizer installed on the forums. It will automatically resize any images that exceed a certain size so will hopefully stop large images creating scrollbars or breaking the site layout for narrow users. The full image still gets downloaded before the resizing takes place so you will need to wait for the page and all images to load to see it work. The original image can then be viewed by clicking on the bar that appears above it. Finally, you can control the behaviour of the resizing in your User CP > Edit Options > Thread Display Options. You can choose whether or not to resize the images in the first place and then how to open the original images as well as choosing your own maximum width/heights if you don't like my default (Width: 800). Let me know how it goes.