Random blue pixels with Adobe Lightroom?

I just started using Adobe's Lightroom program, and when I'm in the develop section I keep getting odd clusters of blue pixels in the photo that I'm working on. This is after I select a preset, and the smaller view in the top right shows it how it should look, without the blue pixels. Also, when I save it as the edited form the pixels aren't there either; it just looks like how the preset should have it. It's not the end of the world, but I was wondering if that's just how Lightroom is, or if there is something I can do to fix it.