Has anybody noticed?

So, I have been noticing the past couple days that my blog pictures seem a little off. Meaning, when you look at them small, not enlarged, they look EXTRA bright, then you click to enlarge them and they look more "normal." Has anyone else noticed that? I am trying to figure out if it is just our computer, or my blog, or what?? I haven't noticed it on anyone else's blog, so I am getting really confused. So, I would love to know if anyone else notices this on my blog too. Thanks!