I created a slider (Nivo) for the homepage and a few weeks ago I uploaded a 1920x610 image and the image got scaled down to 1280x406. Today I uploaded another image (same size) and now it got scaled down to 800x253. How can I configure the slider so the image doesn't get resized? Right now the images look too pixelated on larger screens.

I think I read somewhere that the images get scaled down to the size of the container... but this site is responsive and the container is 100%.

Any help would be greatly appreciated!

EDIT: It turns out someone changed the media settings. I changed it back and everything works fine now!