suffering hdcms Hi. It does not act like that for me. Are You sure it's happening on every product? I've resized chrome's window here multiple times:
sidebar is correct always. Please tell me which product should I test it with? Only think I've noticed was an issue with images in bottom module not resizing. To fix that try add this to css:
img {
vertical-align: middle;
max-width: 100%;
height: auto;
}