Ok guys just a quick question. I don't know if this is common or a virus or something. I've noticed recently that on some pages when the screen doesn't load all the way up some boxes that should contain pics or links has a square and a question mark in it. Is this commong with some websites or is there something wrong with my mac. I also noticed when the page is still loading you can see some of the boxes with the question mark but after fully loading the thing goes away and shows the normal thing.