When you select a featured image on posts it gets cropped on the first page to either 750x380 px for one in the slider or 470x140 for primary images lower down the page. What looks like a near full size image is displayed on the post when you click through.
Depending on the image used it can look awful on the front page (esp for primary images as the crop is more severe). Is there a way to either select which area of the image is used on the front page or use a different image on the front page (cropped myself in Photoshop) with the original full size image on the post page (or don't automatically show the image on the post page so I can add it myself manually like it does on the WordPress.com version).
The image at the bottom on my homepage is an example of the problem I'm facing -