I have just started building a site and so far I have 1 page with 2 tables on it. I have both tables set at 100% width and page borders and margins set to 0. It renders fine in IE (well it would wouldn't it!) and Mozilla, but in Opera it shows about a 10px margin all the way round the tables? And as I have the content of the tables constructed at 780px (expandable), that could cause a problem for 800x600 users. I can't recall seeing that effect before, and I have other sites with pages like this. Does anyone have any idea to what's going on?