remove grey border on blog post image

I successfully removed the grey borders on the images on all my pages, but not on the blog post images. How do I remove the borders on the blog post images too? Additionally, now my (static) home page is not aligned at the top (content center area with the right side bar). The content box seems to have slipped about 3/4 of an inch down...but ONLY on the home page. The others are as they should be. http://www.JanDeelstra.com I blame sunspots...and retrograde Mercury.... ;-)