I just started using Apple Mail in a new iMac (OS10.8.2). I have noticed that when I view a message, the images often do not show up. An example is shown below. Instead, I see a box with an enclosed question mark where the image should be. There is a button at the top of the message named Load Images that will usually cause the images to load, but this is a hassle, and it doesn't always work. Is this a known problem. or is there a setting that causes the images to always be downloaded automatically?