[support] Graphics and scaling.

I have 2 problems this rainy morning (apart from the leak in the roof) :

- I don't understand why images scale and then don't, I have my site tony-mac.com (drupal7.12 / Omega) and my logo doesn't scale down when I minimize the browser. It used to but the only thing I added (and this could have nothing at all to do with it, as I have changed the logo image from jpg to png and back amongst other things) in the css is maxwidth=100%.I did some googling but don't find anything that really clarifies the issue of scaling for me. (I have no width and height properties associated with the image). - Why does the image look grainy in opera?

Thanks for any tips. Tony