I'm using a customized minimalist theme and the images on my main page are blurry when uploaded. When you click on the image it goes to a new page and the images is much more sharp. I customized the width of the images to be 800px wide. Before I upload an image I use Photoshop to resize the image to 800px wide but the problem persists. For some reason when the image is uploaded the quality is reduced.
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Blog url: http://jmlalonde.wordpress.com/