I have a website that works in Firefox 3.x, chrome, safari and other browsers. The new Firefox 4 does not show expected results. The webpage page shows a main image and a number of thumbnail pictures. The thumbnails can be of different aspect ratios but are shown in equ-size place-holders. The thumbnails are rendered using javascript. Hovering the mouse over a thumbnail cuases that image to be shown in the main-image position. The problem is that the thumb images are shown as the same width and height of the first image rendered. This is wrong as each one should be shown with it's own width and height. Choosing the nextpage of images shows how the images should be rendered as they are all the same size. pressing the previous page produces a completely different result to the inital showing, as the images are taking on the width and height of the previous images and NOT taking the new width and height written by he Java.