I've been using Opera for about a year (just recently made it my primary browser) and I've noticed this too ... as far as I know there isn't much you can do about it (something to do with the way/rate that Opera refreshes your screen). One of Opera's odd little quirks. Once you get past those quirks, there's a lot to like about the browser (like the fact that it will view WAP sites; that you can go to a page you're working on, hit "CTRL + ALT + V" and it will automatically validate that page with the w3c validator; their bundled email client, while simple, is also VERY easy to use and fantasically simple to move contacts from one computer to another; etc.). One of the other nice things about Opera is that if it works in Opera, there's a fairly good chance it will work in IE and NN6+/Mozilla (at least that's been my experience). Not to say that it's not lacking certain things (like better DOM support, certain CSS features, etc.), but overall, a heck of a bang for the buck.